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Title: Dynamic strain aging in low cycle fatigue of duplex titanium alloys
Authors: Yi-Hsiang Lin
Kan-Hung Hu
Fang-Hsin Kao
Shing-Hoa Wang
Jer-Ren Yang
Chih-Kuang Lin
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Keywords: Titanium alloys
Low cycle fatigue
Dynamic strain aging
Date: 2011-04
Issue Date: 2018-09-27T02:30:36Z
Publisher: Materials Science and Engineering A
Abstract: Abstract: The influence of dynamic strain aging (DSA) on low cycle fatigue (LCF) in duplex Ti-6-4 and SP700 titanium alloys was studied. LCF was performed within the temperature range from 350 °C to 450 °C, at strain rates of 10−3 s−1 and 10−4 s−1, and strain amplitudes of 1.25% and 2%. DSA appeared as serrations at the plastic portion of the cyclic stress–strain hysteresis loop, as well as stress humps appearing in the cyclic stress response (CSR) curve of peak tensile stress response versus cycle number. Strain-induced micro twin formation was only observed in the sample after fatigue with 2% strain amplitude under a 10−4 s−1 strain rate, indicating that it is a DSA induced phenomenon.
Relation: 528(13-14) pp.4381-4389
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50247
Appears in Collections:[機械與機電工程學系] 期刊論文

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