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Accession Number:
AD0275286
Title:
EFFECTS OF SEVERE THERMAL AND STRESS HISTORIES ON MATERIAL STRENGTH - RATE PROCESS THEORY APPROACH AISI 301 EXTRA HARD, PH 15-7 MO RH, RENE' 41, 7075-T6
Corporate Author:
AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OHIO
Report Date:
1962-01-01
Abstract:
Methods and design data were developed for estimating the design strengths of 3 high temperature alloys under conditions of severe temperature histories. The rate-process based parameter TC log t was applied with good results to the thermal exposure strength degradation of two high strength stainless steels, AISI Type 301, Extra Hard temper, and PH 15-7 Mo, RH conditions. The same parameter gave indication of applying to the super-alloy Rene 41. Stress applied during thermal exposure had little effect in promoting degradation of basic material strength. In Rene 41, stress during thermal exposure in air contributed to surface deterioration which caused large reductions in ultimate tensile strength and tensile elongation. The previous parametric temperature-time-stress exposure study on Al alloy 7075-T6 was extended to cover the shear and bearing modes of failure in this material. Simplified testing concepts, including the use of hardness as an indicator of strength, were applied to studies of the high temperature alloys. Author
Pages:
0001
Contract Number:
AF33 616 5769
File Size:
0.00MB
