Ravi, R, Prasad, YVRK, Sarma, VVS
Materials workability is one of the important aspects for any process design to achieve quality products. Identifying optimum process parameters like temperature, strain rate, and strain are normally...
Ravi, R, Prasad, YVRK, Sarma, VVS
Materials workability is one of the important aspects for any process design to achieve quality products. Identifying optimum process parameters like temperature, strain rate, and strain are normally...
Artificial neural network model for predicting stable and unstable regions in Cu-Zn alloys (2006)
Ravi, R, Prasad, YVRK, Sarma, VVS, Raidu, RS
Processing maps are developed using the Dynamic Materials Model (DMM) and instability criterion, which help in choosing optimum process parameters for hot-working of materials. Certain high-level...
Artificial neural network model for predicting stable and unstable regions in Cu-Zn alloys (2006)
Ravi, R, Prasad, YVRK, Sarma, VVS, Raidu, RS
Processing maps are developed using the Dynamic Materials Model (DMM) and instability criterion, which help in choosing optimum process parameters for hot-working of materials. Certain high-level...
Processing Parameters for the Mechanical Working of 9 Cr-1 Mo Steel: Processing Maps Approach (2004)
Sivaprasad, PV, Mannan, SL, Prasad, YVRK
Processing and instability maps using a dynamic materials model have been developed for 9Cr-1Mo steel in the temperature range 850 to 1200°C and strain rate range 0.001-100 $s^-^1$ with a view to...
Processing Parameters for the Mechanical Working of 9 Cr-1 Mo Steel: Processing Maps Approach (2004)
Sivaprasad, PV, Mannan, SL, Prasad, YVRK
Processing and instability maps using a dynamic materials model have been developed for 9Cr-1Mo steel in the temperature range 850 to 1200°C and strain rate range 0.001-100 $s^-^1$ with a view to...
Ravi, R, Prasad, YVRK, Sarma, VVS
Most of the time (and cost) involved in planning hot forging process is related to activities strongly dependent on human expertise, intuition, and creativity, and also to iterative procedure...
Processing Maps: A Status Report (2003)
In the last two decades, processing maps have been developed on a wide variety of materials including metals and alloys, metal matrix composites, and aluminides, and applied to optimizing hot...
Ravi, R, Prasad, YVRK, Sarma, VVS
Most of the time (and cost) involved in planning hot forging process is related to activities strongly dependent on human expertise, intuition, and creativity, and also to iterative procedure...
Processing Maps: A Status Report (2003)
In the last two decades, processing maps have been developed on a wide variety of materials including metals and alloys, metal matrix composites, and aluminides, and applied to optimizing hot...
Deformation behaviour of beta titanium alloy Ti–10V–4.5Fe–1.5Al in hot upset forging (2002)
Balasubrahmanyam, VV, Prasad, YVRK
The characteristics of hot deformation of a beta titanium alloy Ti–10V–4.5Fe–1.5Al have been studied by upset forging in the temperature range 650–900 °C and strain rate range $0.001–100...
Deformation behaviour of beta titanium alloy Ti–10V–4.5Fe–1.5Al in hot upset forging (2002)
Balasubrahmanyam, VV, Prasad, YVRK
The characteristics of hot deformation of a beta titanium alloy Ti–10V–4.5Fe–1.5Al have been studied by upset forging in the temperature range 650–900 °C and strain rate range $0.001–100...
Hot deformation mechanisms in metastable beta titanium alloy Ti-10V-2Fe-3Al (2001)
Balasubrahmanyam, VV, Prasad, YVRK
The mechanisms of hot deformation in the \beta titanium alloy Ti–10V–2Fe–3Al have been characterised in the temperature range $650-850^o C$ and strain rate range $0.001-100 s^{-1}$ using...
Hot working behavior of extruded powder products of B2 iron aluminide alloys (2001)
Prasad, YVRK, Sastry, DH, Deevi, SC
The characteristics of hot deformation of hot extruded B2 type iron aluminide alloy powders produced by gas-atomization and water-atomization techniques have been studied using compression tests in...
A Study of Beta Processing of Ti-6Al-4V: Is it Trivial? (2001)
Prasad, YVRK, Seshacharyulu, T, Medeiros, SC, Frazier, WG
Deformation of Ti-6Al-4V alloy in the \beta phase field is generally considered to be trivial since the material is highly workable at these temperatures and does not normally pose problems during...
Hot working behavior of extruded powder products of B2 iron aluminide alloys (2001)
Prasad, YVRK, Sastry, DH, Deevi, SC
The characteristics of hot deformation of hot extruded B2 type iron aluminide alloy powders produced by gas-atomization and water-atomization techniques have been studied using compression tests in...
A Study of Beta Processing of Ti-6Al-4V: Is it Trivial? (2001)
Prasad, YVRK, Seshacharyulu, T, Medeiros, SC, Frazier, WG
Deformation of Ti-6Al-4V alloy in the \beta phase field is generally considered to be trivial since the material is highly workable at these temperatures and does not normally pose problems during...
Characterization of mechanisms of hot deformation of as-cast nickel aluminide alloy (2000)
Prasad, YVRK, Sasidhara, S, Sikka, VK
The hot deformation behavior of as-cast $Ni_3Al$ alloy has been characterized on the basis of its flow stress variation obtained by isothermal constant true strain rate compression testing in the...
Processing maps for hot working of a P/M iron aluminide alloy (2000)
Prasad, YVRK, Sastry, DH, Deevi, SC
The hot working behavior of a Fe-24 wt.% Al iron aluminide alloy processed by the powder metallurgy route has been studied in the temperature range 750-1150°C and strain rate range $0.001-100...
Characterization of mechanisms of hot deformation of as-cast nickel aluminide alloy (2000)
Prasad, YVRK, Sasidhara, S, Sikka, VK
The hot deformation behavior of as-cast $Ni_3Al$ alloy has been characterized on the basis of its flow stress variation obtained by isothermal constant true strain rate compression testing in the...
Processing maps for hot working of a P/M iron aluminide alloy (2000)
Prasad, YVRK, Sastry, DH, Deevi, SC
The hot working behavior of a Fe-24 wt.% Al iron aluminide alloy processed by the powder metallurgy route has been studied in the temperature range 750-1150°C and strain rate range $0.001-100...
Processing of iron aluminides (1998)
Sundar, RS, Baligidad, RG, Prasad, YVRK, Sastry, DH
A processing route comprising of air induction melting (AIM) with protective cover and electroslag remelting (ESR) for production of iron aluminide $(Fe_3Al)$ alloys has been developed. The use of...
Processing of iron aluminides (1998)
Sundar, RS, Baligidad, RG, Prasad, YVRK, Sastry, DH
A processing route comprising of air induction melting (AIM) with protective cover and electroslag remelting (ESR) for production of iron aluminide $(Fe_3Al)$ alloys has been developed. The use of...
Processing maps for hot working of titanium alloys (1998)
Prasad, YVRK, Seshacharyulu, T
In recent years, processing maps are being used to design hot working schedules for making near-net shapes in a wide variety of materials. In this paper, the results obtained on the characterization...
Modelling of hot deformation for microstructural control (1998)
Prasad, YVRK, Seshacharyulu, T
An understanding of the constitutive behavior of the material is essential for the optimization of the intrinsic workability and control of microstructural evolution during hot working. In recent...
Processing maps for hot working of titanium alloys (1998)
Prasad, YVRK, Seshacharyulu, T
In recent years, processing maps are being used to design hot working schedules for making near-net shapes in a wide variety of materials. In this paper, the results obtained on the characterization...
Processing of iron aluminides (1998)
Sundar, RS, Baligidad, RG, Prasad, YVRK, Sastry, DH
A processing route comprising of air induction melting (AIM) with protective cover and electroslag remelting (ESR) for production of iron aluminide $(Fe_3Al)$ alloys has been developed. The use of...
Modelling of hot deformation for microstructural control (1998)
Prasad, YVRK, Seshacharyulu, T
An understanding of the constitutive behavior of the material is essential for the optimization of the intrinsic workability and control of microstructural evolution during hot working. In recent...
Somani, MC, Birla, NC, Prasad, YVRK, Singh, V
The microstructural features of hot-extruded Nimonic AP-1 superalloy powder are presented in this paper. Experiments have been designed to validate the processing maps of Nimonic AP-1...
The hot-working characteristics of Nimonic 75, 80A and 90 are studied in the temperature range 850-1200°C and strain rate range $0.001-100s^{-1}$ using hot-compression tests. Processing maps for hot...
The hot-working characteristics of Nimonic 75, 80A and 90 are studied in the temperature range 850-1200°C and strain rate range $0.001-100s^{-1}$ using hot-compression tests. Processing maps for hot...
Somani, MC, Birla, NC, Prasad, YVRK, Singh, V
The microstructural features of hot-extruded Nimonic AP-1 superalloy powder are presented in this paper. Experiments have been designed to validate the processing maps of Nimonic AP-1...
A study of hot deformation of Cd-1% Zn alloy using power dissipation maps (1994)
Rajaram, R, Ravichandran, N, Prasad, YVRK
The hot deformation behavior of Cd 1% Zn alloy has been studied using hot compression testing in the temperature range 50-300 deg C and in the strain rate range 0.001-100 s exp -1 . On the basis of...
Hot-working characteristics of nichrome and the development of a processing map (1994)
A processing map for the hot working of nichrome has been developed on the basis of hot compression data in the temperature range 750-1200 °C and strain-rate range $0.0003-100\hspace{2mm} s^{-1}$....
A study of hot deformation of Cd-1% Zn alloy using power dissipation maps (1994)
Rajaram, R, Ravichandran, N, Prasad, YVRK
The hot deformation behavior of Cd 1% Zn alloy has been studied using hot compression testing in the temperature range 50-300 deg C and in the strain rate range 0.001-100 s exp -1 . On the basis of...
Hot-working characteristics of nichrome and the development of a processing map (1994)
A processing map for the hot working of nichrome has been developed on the basis of hot compression data in the temperature range 750-1200 °C and strain-rate range $0.0003-100\hspace{2mm} s^{-1}$....
The constitutive flow behavior of 6061Al-SiCp composites at elevated temperature. (1993)
Sarkar, J, Prasad, YVRK, Surappa, MK
Hot deformation tests were carried out on l6061-18vol.%SiCp composites and the flow stress curves were developed as a function of temp. and strain rate. The steady-state flow was the main feature of...
The constitutive flow behavior of 6061Al-SiCp composites at elevated temperature. (1993)
Sarkar, J, Prasad, YVRK, Surappa, MK
Hot deformation tests were carried out on l6061-18vol.%SiCp composites and the flow stress curves were developed as a function of temp. and strain rate. The steady-state flow was the main feature of...
Influence of oxygen on dynamic recrystallization during hot working of polycrystalline copper (1992)
The characteristics of dynamic recrystallization (DRX) during hot working of copper containing various amounts of oxygen are studied in the temperature range 650–950 °C and strain-rate range...
Influence of sulfur on the processing map for hot working of nickel (1992)
It is well known that sulfur segregates to grain boundaries in nickel and causes hot shortness [1-3]. At lower sulfnr levels (2-20 ppm), the concentration of sulfur at grain boundaries is sufficient...
Influence of sulfur on the processing map for hot working of nickel (1992)
It is well known that sulfur segregates to grain boundaries in nickel and causes hot shortness [1-3]. At lower sulfnr levels (2-20 ppm), the concentration of sulfur at grain boundaries is sufficient...
Influence of oxygen on dynamic recrystallization during hot working of polycrystalline copper (1992)
The characteristics of dynamic recrystallization (DRX) during hot working of copper containing various amounts of oxygen are studied in the temperature range 650–950 °C and strain-rate range...
Effect of zinc content on processing map for hot deformation of beta brass (1991)
Padmavardhani, D, Prasad, YVRK
The effect of zinc content on the processing map for hot deformation of β brass has been studied in the temperature range 550-800°C and strain rate range $0.001-100 s^{-1}$ in brasses containing...
Dynamic recrystallization during hot deformation of aluminum: A study using processing maps (1991)
The hot deformation behavior of aluminum of different purities has been studied in the temperature range of 250 °C to 600 °C and strain-rate range of 10 3 to 102 s’1. On the basis of the flow...
Effect of zinc content on processing map for hot deformation of beta brass (1991)
Padmavardhani, D, Prasad, YVRK
The effect of zinc content on the processing map for hot deformation of β brass has been studied in the temperature range 550-800°C and strain rate range $0.001-100 s^{-1}$ in brasses containing...
Dynamic recrystallization during hot deformation of aluminum: A study using processing maps (1991)
The hot deformation behavior of aluminum of different purities has been studied in the temperature range of 250 °C to 600 °C and strain-rate range of 10 3 to 102 s’1. On the basis of the flow...
Fractographic features of 2618 aluminum alloy fractured in high temperature torsion (1987)
Panchapagesan, TS, Jain, NK, Prasad, YVRK
The 2618 Al alloy undergoes ductile fracture in torsion at 750 K and 0.42/s strain rate. According to SEM, this behavior is revealed by fine dimple features on the fractured surface. At higher strain...
Fractographic features of 2618 aluminum alloy fractured in high temperature torsion (1987)
Panchapagesan, TS, Jain, NK, Prasad, YVRK
The 2618 Al alloy undergoes ductile fracture in torsion at 750 K and 0.42/s strain rate. According to SEM, this behavior is revealed by fine dimple features on the fractured surface. At higher strain...
Hot torsional study of electroslag refined RR 58 (1984)
Jain, NK, Nair, Krishnadas CG, Abraham, KP, Prasad, YVRK
The optimum hot-working temperature for RR 58 [12793-49-6] Al alloy was 750 or 800 K for the electroslag refined or air-melted alloy, respectively. Hot ductility of the refined alloy did not...
Texture-dependent mechanical properties of metals and alloys (1984)
The influence of texture on elastic anisotropy, plastic anisotropy, formability, yield strength, ductility, fatigue, fracture toughness, and environmentally-aided fracture is reviewed with 86...
Hot torsional study of electroslag refined RR 58 (1984)
Jain, NK, Nair, Krishnadas CG, Abraham, KP, Prasad, YVRK
The optimum hot-working temperature for RR 58 [12793-49-6] Al alloy was 750 or 800 K for the electroslag refined or air-melted alloy, respectively. Hot ductility of the refined alloy did not...
Texture-dependent mechanical properties of metals and alloys (1984)
The influence of texture on elastic anisotropy, plastic anisotropy, formability, yield strength, ductility, fatigue, fracture toughness, and environmentally-aided fracture is reviewed with 86...
Strengthening mechanisms in hot-rolled magnesium and magnesium alloys (1983)
Rao, Sambasiva G, Prasad, YVRK
The relative contributions of various strengthening mechanisms such as grain-boundary strengthening, texture strengthening and solid-solution strengthening in hot-rolled Mg, Mg-12.5Li, Mg-5Tl and...
Changes in texture and grain size in hot rolled magnesium and effect on yield strength (1983)
Rao, Sambasiva G, Prasad, YVRK
Variations in the grain size and basal texture in magnesium hot-rolled in the temperature range 570-770 K have been studied and compared with those observed in specimens hot-rolled at 570 K and...
Strengthening mechanisms in hot-rolled magnesium and magnesium alloys (1983)
Rao, Sambasiva G, Prasad, YVRK
The relative contributions of various strengthening mechanisms such as grain-boundary strengthening, texture strengthening and solid-solution strengthening in hot-rolled Mg, Mg-12.5Li, Mg-5Tl and...
Changes in texture and grain size in hot rolled magnesium and effect on yield strength (1983)
Rao, Sambasiva G, Prasad, YVRK
Variations in the grain size and basal texture in magnesium hot-rolled in the temperature range 570-770 K have been studied and compared with those observed in specimens hot-rolled at 570 K and...
Slip structure and Crack Growth during Fatigue in Aluminum and Aluminum-1% Magnesium (1972)
Ramaraju, K, Prasad, YVRK, Vasu, KI
The surface slip structure produced by fatigue deformation in aluminum and aluminum- 1 magnesium alloy was observed. Slip bands, rumples, and "mat" type and linear features were all observed in pure...
Slip structure and Crack Growth during Fatigue in Aluminum and Aluminum-1% Magnesium (1972)
Ramaraju, K, Prasad, YVRK, Vasu, KI
The surface slip structure produced by fatigue deformation in aluminum and aluminum- 1 magnesium alloy was observed. Slip bands, rumples, and "mat" type and linear features were all observed in pure...
Prasad, YVRK, Sastry, DH, Vasu, KI
Change-in-stress creep experiments involving increments as well as decrements of stress have been conducted on Ag, Au, Cu, Ni, Pb, Pd and Pt at temperatures at and below room temperature. The...
Prasad, YVRK, Sastry, DH, Vasu, KI
Change-in-stress creep experiments involving increments as well as decrements of stress have been conducted on Ag, Au, Cu, Ni, Pb, Pd and Pt at temperatures at and below room temperature. The...