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|Title: ||Cyclic deformation and phase transformation of 6Mo Superaustenitic stainless steel|
|Authors: ||Shing-Hoa Wang, Chia-Chang Wu, Chih-Yuan Chen, Jer-Ren Yang, Po-Kay Chiu, Jason Fang|
|Issue Date: ||2016-02-24T03:17:23Z
|Publisher: ||Metals and Materials International|
|Abstract: ||A fatigue behavior analysis was performed on superaustenitic stainless steel UNS S31254 (Avesta Sheffield 254 SMO), which contains about 6wt.% molybdenum, to examine the cyclic hardening/softening trend, hysteresis loops, the degree of hardening, and fatigue life during cyclic straining in the total strain amplitude range from 0.2 to 1.5%. Independent of strain rate, hardening occurs first, followed by softening. The degree of hardening is dependent on the magnitude of strain amplitude. The cyclic stress-strain curve shows material softening. The lower slope of the degree of hardening versus the strain amplitude curve at a high strain rate is attributed to the fast development of dislocation structures and quick saturation. The ε martensite formation, either in band or sheath form, depending on the strain rate, leads to secondary hardening at the high strain amplitude of 1.5%.|
|Appears in Collections:||[機械與機電工程學系] 期刊論文|
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