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

[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.

[发布日期] 2002-12-01 [发布机构] Battelle Memorial Institute

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