2026-09-21T19:45:00Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/70127 2023-07-11 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Wu, Kuang-Hsi 2014-12-15T21:41:16Z 2014-12-15T21:41:16Z 10000-01-01 1984 1984 Circular-notched and sharp-notched 304 stainless steel specimens were subjected to constant load creep, cyclic loading with hold-time and fatigue loadings at 650(DEGREES)C to determine the lives, failure modes and to understand creep-fatigue interaction mechanisms. The hold-times are one minute and ten minutes. Double-notch specimens were used so that the material under semi-damaged condition in one notch can be examined when the other is broken. Stress analysis, life prediction and microstructure studies were carried out. It was found that for circular-notched specimens, creep failure mechanism predominates and no creep-fatigue interaction takes place. Cyclic loadings have a beneficial effect of prolonging the specimen life at a very short hold-time loading. Fracture initiates from the center of the specimen, except at very high frequency tests. For sharp-notched specimens strong creep-fatigue interaction occurs at short hold-time tests and the lives of specimens are reduced significantly. At a long hold-time the interaction effect is minor. Fracture of all specimens initiates from the notch root. Made available in DSpace on 2014-12-15T21:41:16Z (GMT). No. of bitstreams: 1 8502349.pdf: 7906980 bytes, checksum: ef3fd991006df95d152cc24f57565fe5 (MD5) Previous issue date: 1984 Embargo set by: Seth Robbins for item 70293 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 236 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1984. http://hdl.handle.net/2142/70127 (UMI)AAI8502349 Engineering, Mechanical Creep-Fatigue Interaction of Notched 304 Stainless Steel Bars text Mechanical Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.