FEASIBILITY DEMONSTRATION OF A TRANSPIRATION COOLED NOZZLE SYSTEM (2006)
Smith, K. J., Poulos, E. N., Steigerwald, E. A., Lally, F., Peck, J. V., Pappas, C.
The use of transpiration cooling for advanced solid propellant application is described. The mechanism used for demonstration purposes consisted of a porous tungsten insert cooled by anhydrous...
ENGINEERING PRACTICE TO AVOID STRESS CORROSION CRACKING (2005)
Forsyth, P., Jaffee, R. I., Brown, R. J., Steigerwald, E. A.
Contents: The examination of service failures; The relative influence of stress and environment on titanium; The relative influence of stress and environment on aluminium; Characteristics of...
STRAIN AGING AND DELAYED FAILURE IN HIGH-STRENGTH STEELS (2005)
AD-294 397Div. 4, 14U TISTM/S R) Royal Aircraft Es ablishment (G T. Brit.) . REACTIONS OF BROMI E-CONTAINING PHOSPHATE ESTERS WI H MAGNESIUM, LIT IUM AND n-BUTYL-LI HIUM, by I. M. White, M. . H. H i...
INFLUENCE OF WORK HARDENING EXPONENT ON CRACK PROPAGATION IN HIGH-STRENGTH MATERIALS. (2005)
Hanna, G. L., Steigerwald, E. A.
The influence of work hardening exponent on the variation of fracture toughness with material thickness was studied for high strength steel, aluminum, and titanium alloys. A variety of materials...
STRESS CORROSION CRACKING MECHANISMS IN MARTENSITIC HIGH STRENGTH STEELS. (2005)
Benjamin, W. D., Steigerwald, E. A.
Delayed failures of martensitic high-strength steels in aqueous environments were studied to determine the effect of environmental and metallurgical variables on the mechanisms of stress corrosion....
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS (2005)
Results are obtained from smooth and notch tensile tests conducted on the 18% Ni maraging steels. A significant difference in smooth strength properties existed between two heats of the 250,000 psi...
INFLUENCE OF ENVIRONMENT ON CRACK PROPAGATION AND DELAYED FAILURES IN HIGH-STRENGTH STEELS. (2005)
Hanna,G. L., Steigerwald,E. A.
Environmentally-induced crack propagation was studied in several classes of high-strength steels with particular emphasis on the influence of aqueous media. Low alloy martensitic steels, 4340 and...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS. (2005)
AMATEAU,M. F., Steigerwald,E. A.
The correspondence between plain strain fracture toughness values obtained from various test methods was evaluated for AISI 4340 steel over a range of material thickness and strength levels. Attempts...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS. (2005)
Amateau,M. F., Steigerwald,E. A.
An examination was conducted to determine the applicability of plane strain fracture toughness values, K SUB IC, as a possible handbook design parameter. The program included: compilation of...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS. (2005)
AMATEAU,M. F., Steigerwald,E. A.
The purpose of this program is to evaluate the use of plane strain fracture toughness (K sub IC) as a possible parameter for handbook application. During this report period, a literature survey...
DEVELOPMENT OF PLANE STRAIN FRACTURE TOUGHNESS FOR HANDBOOK PRESENTATION. (2005)
The purpose of this program is to experimentally determine plane strain fracture toughness (KIC) values for a variety of high strength-to-weight materials over a range of test temperatures. The...
Steigerwald,E. A., Vishnevsky,C.
A literature survey was conducted to summarize the known effects of solid solution additions on the fracture toughness of high-strength steels. The results indicate that nickel is the singular alloy...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS. (2005)
AMATEAU,M. F., Hanna,G. L., Steigerwald,E. A.
This report was divided into two parts. The first consists of the results of a literature survey being conducted to assemble K sub IC data for possible use in handbook form. In addition, selected...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS. (2005)
An experimental program was conducted to deter mine the plane strain fracture toughness K sub IC of the following high-strength materials: 4340 steel; H-11 steel; Maraging steel; and Beta titanium....
CREEP BEHAVIOR OF REFRACTORY ALLOYS IN ULTRAHIGH VACUUM. (1998)
SHEFFLER,K. D., SAWYER,J. C., STEIGERWALD,E. A.
PAPER PRESENTED AT A CONFERENCE HELD AT NASA LEWIS RESEARCH CENTER CLEVELAND, OHIO 26 JUN 69.
PLANE STRAIN FRACTURE TOUGHNESS OF SOME CRYOGENIC MATERIALS AT ROOM AND SUBZERO TEMPERATURES. (1998)
VISHNEVSKY,C., STEIGERWALD,E. A.
Paper presented at the symposium on Fracture Toughness Testing at Cryogenic Temperatures, Seventy-third Annual Meeting of the American Society for Testing and Materials, Toronto, Ontario, Canada,...
FRACTURE CHARACTERISTICS OF STRUCTURAL METALS (1998)
The feasibility of employing plane strain fracture toughness (K sub IC) as a handbook type param ter to ca egorize the resistance of high trength materials to crack propagation wa determined. The K...
INFLUENCE OF WORK HARDENING COEFFICIENT ON CRACK PROPAGATION IN HIGH-STRENGTH STEELS. (1998)
Lauta, F. J., Steigerwald, E. A.
Ths influence of work hardening exponent on the fracture toughness of 4340, 18% nickel maraging, and AM-355 stainless steel was studied. In most cases the effects produced by variations in work...
THE RELATIONSHIP BETWEEN PLASTIC DEFORMATION AND FRACTURE IN ALPHA TITANIUM. (1998)
Amateau, M. F., Steigerwald, E. A.
Crack initiation and propagation behavior was studied in unalloyed titanium containing between 0.25 and 0.6% oxygen and in Ti-5Al-2.5Sn alloy containing between 0.07 and 0.37% oxygen. Large-grained...
DEVELOPMENT OF PLANE STRAIN FRACTURE TOUGHNESS FOR HANDBOOK PRESENTATION. (1998)
Amateau, M. F., Steigerwald, E. A.
The purpose of this program is to experimentally determine plane strain fracture toughness values for a variety of high strength-to-weight materials over a range of test temperatures. The ultimate...
Visheysky,C., Steigerwald,E. A.
The study examined the effects of various elements on the notch bend fracture toughness and Charpy impact behavior of a 0.35%C, 3%Ni, Cr-Mo-V martensitic steel having a room temperature yield...
EVALUATION OF HYDROGEN EMBRITTLEMENT MECHANISMS. (1998)
Barth,C. F., Steigerwald,E. A.
The incubation time which precedes the initiation of slow crack growth in the delayed failure of high-strength steel containing hydrogen was reversible with respect to the applied stress. The...
A Comparison of Hydrogen Embrittlement and Stress Corrosion Cracking in High Strength Steels. (1998)
Kortovich, C. S., Steigerwald, E. A.
The purpose of the study was to compare the known behavior of hydrogen embrittled high-strength steel to the characteristics of environmentally-induced stress corrosion failure where hydrogen is...
Corrosion Fatigue Behavior of 4340 Steel Above K sub I scc. (1998)
Kortovich,C. S., Steigerwald,E. A.
The purpose of the program was to study the corrosion fatigue behavior of AISI 4340 in distilled water above K sub Iscc. The results obtained by superimposing fatigue crack growth behavior determined...
Generation of Long Time Creep Data of Refractory Alloys at Elevated Temperatures (1998)
Sawyer, J. C., Steigerwald, E. A.
Creep tests were conducted on selected refractory alloys in a vacuum environment (< 1 x 10(exp -8) torr) for times between 100 and 15, 000 hours. Since the ultimate program goal was to provide design...