Sha, G., Wang, Y.B., Liao, X.Z., Duan, Z.C., Ringer, S.P., Langdon, T.G.
Processing by equal-channel angular pressing (ECAP) affects the morphology of η precipitates in an Al–Zn–Mg–Cu (Al-7136) alloy. It is shown by transmission electron microscopy that ECAP...
Wang, Z.W., Wang, Y.B., Liao, X.Z., Zhao, Y.H., Lavernia, Y.T., Zhu, Y.T., ...
Partial dislocation emission from grain boundaries in metals with medium-to-high stacking fault energies is observed primarily in the grain size range of a few tens of nanometers. Here we report that...
New observations on high-temperature creep at very low stresses (2009)
Kumar, P., Kassner, M. E., Blum, W., Eisenlohr, P., Langdon, T. G.
An evaluation of microstructure and microhardness in copper subjected to ultra-high strains (2008)
Zhilyaev, A.P., Swaminatham, S., Gimazov, A.A., McNelley, T.R., Langdon, T.G.
The microstructure and microhardness of copper subjected to large strains either using one or a combination of severe plastic deformation (SPD) processing techniques was evaluated. The individual SPD...
Zhao, Y.H., Liao, X.Z., Horita, Z., Langdon, T.G., Zhu, Y.T.
Bulk ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) often have low ductility. A previous study demonstrated the possibility of lowering the stacking fault energy to...
Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys (2008)
Rajulapati, K.V., Scattergood, R.O., Murty, K.L., Horita, Z., Langdon, T.G., Koch, C.C.
The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using...
Influence of specimen dimensions on the tensile behavior of ultrafine-grained Cu (2008)
Zhao, Y.H., Guo, Y.Z., Wei, Q., Dangelewicz, A.M., Xu, C., Zhu, Y.T., ...
Miniature dog-bone specimens with different sizes and geometries are frequently used to measure the tensile behaviors of nanostructured materials. Here we report a significant specimen dimensions...
Zhilyaev, A.P., Gimazov, A.A., Soshnikova, E.P., Révész, Á, Langdon, T.G.
The microstructures of highly strained high-pressure torsion (HPT) nickel processed from bulk master metals pre-strained to different levels of strain and from electrodeposited (ED), ball milled (BM)...
Mechanical properties of sputtered silicon oxynitride films by nanoindentation (2008)
Zhilyaev, A. P., Gimazov, A. A., Soshnikova, E. P., Revesz, A., Langdon, T. G.
Silicon oxynitride (SiON) has received a great deal of attention in micro-electro-mechanical system (MEMS) integration due to its composition dependent tunability in optical, electronic and...
Using high-pressure torsion for the cold-consolidation of copper chips produced by machining (2008)
Zhilyaev, A.P., Gimazov, A.A., Raab, G.I., Langdon, T.G.
High-pressure torsion (HPT) was used to consolidate chips machined from coarse-grained copper and from copper processed by ECAP. The results are compared with discs prepared by HPT and with discs...
Venkateswarlu, K, Ghosh, M, Ray, Ajoy K, Xu, Cheng, Langdon, T G
Equal-channel angular pressing (ECAP) is used extensively in many laboratories for the production of metallic alloys having grain sizes in the submicrometer or nanometer range. However, the ECAP...
Tougher ultrafine grain Cu via high-angle grain boundaries and low dislocation density (2008)
Zhao, Y.H., Bingert, J.F., Zhu, Y.T., Liao, X.Z., Valiev, R.Z., Horita, Z., ...
Although there are a few isolated examples of excellent strength and ductility in single-phase metals with ultrafine grained (UFG) structures, the precise role of different microstructural features...
Zhao, Y.H., Horita, Z., Langdon, T.G., Zhu, Y.T.
Samples of pure Cu, bronze (Cu–10 wt.% Zn) and brass (Cu–30 wt.% Zn) with stacking fault energies (SFE) of 78, 35, and 14 mJ/m2, respectively, were processed by high-pressure torsion (HPT) and by...
Wang, S.C., Starink, M.J., Gao, N., Qiao, X., Xu, C., Langdon, T.G.
The evolution of texture was examined during equal-channel angular pressing (ECAP) of an Al-Zn-Mg-Cu alloy having a strong initial texture. An analysis of the local texture using electron...
Zhao, Y. H., Horita, Z., Langdon, T. G., Zhu, Y. T.
Samples of pure Cu, bronze (Cu-10 wt.% Zn) and brass (Cu-30 wt.% Zn) with stacking fault energies (SFE) of 78,35, and 14 mJ/m(2), respectively, were processed by high-pressure torsion (HPT) and by a...
Ghosh Chowdhury, S, Xu, Cheng, Langdon, T G
The textural evolution of a spray-cast aluminum 7034 alloy was investigated during processing by equal-channel angular pressing (ECAP). Texture weakening was observed after the initial pass but there...
Texture evolution by shear on two planes during ECAP of a high strength aluminium alloy (2008)
Wang, S.C., Starink, M.J., Gao, N., Qiao, X., Xu, C., Langdon, T.G.
The evolution of texture was examined during equal-channel angular pressing (ECAP) of an Al-Zn-Mg-Cu alloy having a strong initial texture. An analysis of the local texture using electron...
Microstructure and mechanical behavior of severely deformed f.c.c. metals (2008)
Gubicza, J., Dobatkin, S., Chinh, N.Q., Langdon, T.G.
The correlation between the microstructure and the mechanical behavior of ultrafinegrained face centered cubic (f.c.c.) metals processed by equal-channel angular pressing (ECAP) was studied. It was...
El procesado de metales policristalinos a través de deformación plástica severa está atrayendo mucha atención, debido al potencial para alcanzar un importante afino de grano a niveles...
The processing of polycrystalline metals through the application of severe plastic deformation is attracting much attention because of the potential for achieving significant grain refinement to the...
Particle and grain growth in an Al-Si alloy during high-pressure torsion (2007)
Zhilyaev, A.P., Garcia-Infanta, J.M., Langdon, T.G., Ruano, O.A.
Microstructure and strength of severly deformed f.c.c. metals. (2007)
Gubicza, J., Chinh, N.Q., Csanádi, T., Langdon, T.G., Ungár, T.
The effect of severe plastic deformation on precipitation in supersaturated Al-Sn-Mg alloys. (2007)
Gubicza, J., Schiller, I., Chinh, N.Q., Illy, J., Horita, Z., Langdon, T.G.
The innovation potential of bulk nanostructured materials (2007)
Valiev, R.Z., Zehetbauer, M.J., Estrin, Y., Höppel, H-W., Ivanisenko, Y., Hahn, H., ...
The innovation potential is high for bulk nanostructured materials (BNM) produced by methods of severe plastic deformation and accordingly this report focuses on very recent developments...
Influence of crystal orientation on the processing of copper single crystals by ECAP (2007)
Fukuda, P., Furukawa, M., Oh-ishi, K., Horita, Z., Langdon, T.G.
Single crystals of high-purity copper, having two different orientations, were pressed through one pass in equal-channel angular pressing (ECAP) at room temperature and then examined using several...
Evolution of microsturcture and mircrotexture in fcc metals during high-pressure torsion (2007)
Zhilyaev, A.P., McNelly, T.R., Langdon, T.G.
Pure nickel and commercially pure (CP) aluminium were selected as model fcc materials for a detailed investigation of the experimental parameters influencing grain refinement and evolution of...
The development of hardness homogeneity in aluminum and an aluminum alloy processed by ECAP (2007)
Equal-channel angular pressing (ECAP) is an effective fabrication process for obtaining ultrafine-grained materials. This paper examines the development of homogeneity in materials processed by ECAP...
Microstructural characteristics of pure gold processed by equal-channel angular processing. (2007)
Gubicza, J., Chinh, N.Q., Szommer, P., Vinogradov, A., Langdon, T.G.
A finite element analysis of the superplastic forming of an aluminum alloy processed by ECAP (2007)
O'Brien, M.J., Von Bremen, H.F., Furukawa, M., Horita, Z., Langdon, T.G.
Grain refinement of high-purity FCC metals using ECAP (2007)
Horita, Z., Kishikawa, K., Kimura, K., Tatsumi, K., Langdon, T.G.
Chowdhury, S.C., Xu, C., Langdon, T.G.
The textural evolution of a spray-cast aluminum 7034 alloy was investigated during processing by equal-channel angular pressing (ECAP). Texture weakening was observed after the initial pass but there...
Microstructure and mechanical behaviour of severely deformed f.c.c. metals (2007)
Gubicza, J., Dobatkin, S., Bakai, Z., Chinh, N.Q., Langdon, T.G.
The evolution of homogeneity on longitudinal sections during processing by ECAP (2007)
Prell, M., Xu, C., Langdon, T.G.
An Al-6061 alloy was processed by equal-channel angular pressing at room temperature for one, two, four and six passes and microhardness measurements were recorded along linear traverses on...
Venkateswarlu, K., Ghosh, M., Ray, A.K., Xu, C., Langdon, T.G.
Equal-channel angular pressing (ECAP) is used extensively in many laboratories for the production of metallic alloys having grain sizes in the submicrometer or nanometer range. However, the ECAP...
Using high -pressure torsion for the cold-consolidation of copper chips produced by machining (2007)
Zhilyaev, A.P., Gimazov, A.A., Raab, G.I., Langdon, T.G.
High-pressure torsion (HPT) was used to consolidate chips machined from coarse-grained copper and from copper processed by ECAP. The results are compared with discs prepared by HPT and with discs...
Microstructural evolution in the processing of bulk samples using high-pressure torsion (2007)
Although high-pressure torsion (HPT) is now a well-established technique for imposing severe plastic deformation on metallic materials, the technique is generally restricted to use with thin disk...
Mechanical properties of a spray-cast aluminum alloy processed by severe plastic deformation (2007)
Xu, C., Kawasaki, M., Furukawa, M., Horita, Z., Langdon, T.G
Experiments were conducted to evaluate the mechanical properties of a spray-cast Al7034 alloy processed by severe plastic deformation. The alloy was received with an average grain size of ~2.1 ﾵm...
The innovation potential of bulk nanostructured materials. (2007)
Valiev, R.Z., Zehetbauer, M.J., Estrin, Y., Höppel, H.W., Ivanisenko, Y., Hahn, H., ...
Advanced Engineering Materials, 9(2007) S.527-33
Zhao, Y.H., Horita, Z., Langdon, T.G., Zhu, Y.T.
Samples of pure Cu, bronze (Cu–10 wt.% Zn) and brass (Cu–30 wt.% Zn) with stacking fault energies (SFE) of 78, 35, and 14 mJ/m2, respectively, were processed by high-pressure torsion (HPT) and by...
Venkateswarlu, K, Das, Goutam, Pramanick, A K, Xu, Cheng, Langdon, T G
As-cast Al–Si alloys exhibit excellent mechanical properties but these properties may be further improved through processing by equal-channel angular pressing (ECAP). In this investigation,...
Starink, M.J., Wang, S.C., Gao, N., Ubhi, H.S., Xu, C., Langdon, T.G.
The texture and grain boundary evolution during equal channel angular pressing (ECAP) of a spray-cast Al-7034 (Al-Zn-Mg-Cu) alloy containing intermetallic particles with a range of sizes was studied...
Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP (2006)
Miyahara, Y., Horita, Z., Langdon, T.G.
Experiments were conducted on a commercial AZ61 alloy to evaluate the potential for achieving an ultrafine grain size and superplastic ductilities through the use of the EX-ECAP two-step processing...
Höppel, H.W., Kautz, M., Xu, C., Murashkin, M., Langdon, T.G., Valiev, R.Z., ...
The objectives of the present study were to assess and to optimize the fatigue behaviour in strain-controlled tests of different ultrafine-grained (UFG) metals and alloys (Cu, Al, AA6061, α-brass)...
Developments in the use of ECAP processing for grain refinement (2006)
Equal-channel angular pressing (ECAP) is one of the most efficient techniques of severe plastic deformation for the production of bulk ultrafine-grained metals. During the last decade the intensive...
Simultaneously elevating the stregth and ductility of ultra-fine-grained pure copper (2006)
Zhao, Y-H., Bingert, J.F., Liao, X-Z., Cui, B-Z., Han, K., Sergueeva, A.V., ...
Zhao, Y.H., Zhu, Y.T., Liao, X.Z., Horita, Z., Langdon, T.G.
Bulk ultrafine grained (UFG) materials produced by severe plastic deformation often have low ductility. Here the authors report that simultaneous increases in ductility and strength can be achieved...
Ungár, T., Balogh, L., Zhu, Y.T., Xu, C., Ribárik, G., Horita, Z, ...
Precipitation behavior in age-hardenable alloys after severe plastic deformation (2006)
Horita, Z., Fujita, T., Kaneko, K., Langdon, T.G.
In this study, equal-channel angular pressing (ECAP) is conducted on age-hardenable Al-based alloys and the precipitation behavior is examined in association with the subsequent aging process. The...
Furui, M., Kitamura, H., Anada, H., Langdon, T.G.
It is well known that alpha+beta duplex structure Mg-Li alloys exhibit an excellent superplastic ductility at intermediate temperatures. Moreover, many researchers have demonstrated that the...
Tests were conducted on a metal matrix composite with an Al-6061 alloy as the matrix material and with 10 vol.% of alumina particulates as the reinforcement. For comparison purposes, some additional...
Equal-channel angular pressing (ECAP) was conducted on a Mg-0.55% Zr alloy at a temperature of 513 K. It is shown that processing by ECAP refines the grain size from similar to 75 to similar to 8.6...
Fundamentals of interface phenomena in advanced bulk nanoscale materials (2005)
Baretzky, B., Baró, M.D., Grabovetskaya, G.P., Gubicza, J., Ivanov, M.B., Kolobov, Yu.R., ...
The review is devoted to a study of interface phenomena influencing advanced properties of nanoscale materials processed by means of severe plastic deformation, high-energy ball milling and their...
Fundamentals of interface phenomena in advanced bulk nanoscale materials (2005)
Baretzky, B., Baró, M. D., Grabovetskaya, G. P., Gubicza, J., Ivanov, M. B., Kolobov, Y. R., ...
Gao, N., Starink, M.J., Xu, C., Langdon, T.G.
Experiments were conducted to evaluate the microstructural evolution occurring in pure aluminium and a spray-cast Al-7034 alloy after processing through equal-channel angular pressing (ECAP)....
Calorimetric and X-ray measurements in ultrafine-grained nickel (2003)
Zhilyaev, A.P., Gubicza, J., Surinach, S., Baro, M.D., Langdon, T.G.
Equal-channel angular pressing as a production tool for superplastic materials (2001)
Horita, Z., Lee, S., Ota, S., Neishi, K., Langdon, T.G.
Equal-channel angular pressing (ECAP) was applied for grain refinement of Al-3%Mg0.2%Fe and Al-3%Mg-0.2%Ti alloys and also for a commercial Al 2024 alloy. The grain sizes of the alloys were reduced...
Furukawa, M., Utsunomiya, A., Komura, S., Horita, Z., Nemoto, M., Langdon, T.G.
Ultrafine grain sizes may be achieved in materials subjected to severe plastic deformation through processing procedures such as equal-channel angular pressing (ECAP). Experiments were conducted to...
Deformation characteristics of Al and Mg alloys subjected to equal channel angular processing (2001)
Stoica, G.M., Chen, L.J., Payzant, E.A., Agnew, S.R., Lu, Y.L., Han, B.Q., ...
The principles of processing using severe plastic deformation: Application to aluminum alloys (2001)
High temperature creep resistance in magnesium alloys and their composites (2001)
Pahutov, M., Sklenicka, V., Kucharov, K., Svoboda, M., Langdon, T.G.
Development of fine grained structures using severe plastic deformation (2000)
Horita, Z., Furukawa, M., Nemoto, M., Langdon, T.G.
Severe plastic deformation provides a processing tool for introducing fine grain sizes into polycrystalline materials. This paper describes the principles of equal channel angular pressing (ECAP) in...
Achieving superplasticity at high strain rates using equal channel angular pressing (2000)
Furukawa, M., Horita, Z., Nemoto, M., Langdon, T.G.
Equal channel angular pressing (ECAP) is a processing procedure in which a sample is pressed through a die containing a channel bent into an L shaped configuration. This procedure introduces a high...
Influence of scandium on superplastic ductilities in an Al-Mg-Sc alloy (2000)
Komura, S., Horita, Z., Furukawa, M., Nemoto, M., Langdon, T.G.
Ultrafine grain sizes, of the order of approximately 0.2 μm, may be introduced into Al-Mg-Sc alloys by subjecting the material to severe plastic deformation through the process of equal-channel...
Superplastic forming at high strain rates after severe plastic deformation (2000)
Horita, Z., Furukawa, M., Nemoto, M., Barnes, A.J., Langdon, T.G.
An Al-3% Mg-0.2% Sc alloy was fabricated by casting and subjected to severe plastic deformation through equal-channel angular pressing to a strain of ~8. The grain size after pressing was ~0.2 μm...
Yamashita, A., Yamaguchi, D., Horita, Z., Langdon, T.G.
Experiments were conducted to evaluate the influence of the pressing temperature when materials are processed by equal-channel angular pressing. The tests were conducted using samples of pure Al, an...
Identifying creep mechanisms at low stresses (2000)
There are three possible mechanisms occurring in high temperature creep at low stresses: diffusion creep, Harper–Dorn creep and grain boundary sliding. This paper examines the characteristics of...
Nakashima, K., Horita, Z., Nemoto, M., Langdon, T.G.
A multi-pass facility was fabricated for equal-channel angular (ECA) pressing which gave a total strain of approximately 5 on a single passage through the die. Experiments on high purity aluminum...
Equal-channel angulare pressing of an Al-6061 metal matrix composite (2000)
An Al-6061 metal matrix composite, reinforced with 10 vol % Al_2O_3 particulates, was subjected to equal-channel angular (ECA) pressing at room temperature to a total strain of sim5. It is shown that...
Horita, Z., Fujinami, T., Nemoto, M., Langdon, T.G.
Using equal-channel angular (ECA) pressing at room temperature, the grain sizes of six different commercial aluminum-based alloys (1100, 2024, 3004, 5083, 6061, and 7075) were reduced to within the...
Factors affecting grain refinement in equal-channel angular pressing (2000)
Yamaguchi, D., Horita, Z., Fujinami, T., Nemoto, M., Langdon, T.G.
Creep of reinforced and unreinforced AZ91 magnesium alloy (2000)
Sklenička, V., Pahutová, M., Kuchařová, K., Svoboda, M., Langdon, T.G.
An examination of the deformation process in equal-channel angular pressing. (2000)
Berbon, P.B., Furukawa, M., Horita, Z., Nemoto, M., Langdon, T.G.
Fujita, T., Komura, S., Horita, Z., Langdon, T.G.
This paper describes grain refinement of an Al-3%Mg-0.2%Sc alloy using the equal-channel angular pressing(ECAP) technique at room temperature. It is shown that a grain size of 0.2.MU.m is obtained...
Flow mechanisms in creep of an AZ91 magnesium based composite (2000)
Sklenicka, V., Pahutová, M., Kucharová, K., Svoboda, M., Langdon, T.G.
Characterization of ultrafine-grained structures produced by severe plastic deformation (2000)
Horita, Z., Furukawa, M., Nemoto, M., Valiev, R.Z., Langdon, T.G.
Creep strength and ductility of an AZ 91 alloy and it's composite (2000)
Pahutová, M., Sklenicka, V., Kucharová, K., Brezina, J., Svoboda, M., Langdon, T.G.