An investigation of the effects of history dependent damage in time dependent fracture mechanics: nano-scale studies of damage evolution

Brust, F. W., Jr. ; Mohan, R. ; Yang, Y.P. ; Oh, J. ; Katsube, N.

Battelle Memorial Institute

关键词: Management;    Temperature Range 0400-1000 K;    Temperature Range 0400-1000 K;    Us Doe;    36 Materials Science;   

DOI  :  10.2172/808726
RP-ID  :  NONE
RP-ID  :  FG02-90ER14135
RP-ID  :  808726

美国|英语

来源: UNT Digital Library

【 摘 要 】

High-temperature operation of technical engineering systems is critical for system efficiency, and will be a key driver in the future US DOE energy policy. Developing an understanding of high-temperature creep and creep-fatigue failure processes is a key driver for the research work described here. The focus is on understanding the high-temperature deformation and damage development on the nano-scale (50 to 500 nm) level. The high-temperature damage development process, especially with regard to low and high cyclic loading, which has received little attention to date, is studied. Damage development under cyclic loading develops in a fashion quite different from the constant load situation. The development of analytical methodologies so that high-temperature management of new systems can be realized is the key goal of this work.