Dynamic strain aging in low cycle fatigue of duplex titanium alloys

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题名:	Dynamic strain aging in low cycle fatigue of duplex titanium alloys
作者:	Lin,YH;Hu,KH;Kao,FH;Wang,SH;Yang,JR;Lin,CK
贡献者:	機械工程學系
关键词:	COMMERCIALLY PURE TITANIUM;STAINLESS-STEEL;TENSILE PROPERTIES;DEFORMATION MECHANISMS;TEMPERATURE;BEHAVIOR;RATES;COMPRESSION;TI-6AL-4V;303-K
日期:	2011
上传时间:	2012-03-27 17:06:36 (UTC+8)
出版者:	國立中央大學
摘要:	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 degrees C to 450 degrees 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. (C) 2011 Elsevier B.V. All rights reserved.
關聯:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
显示于类别:	[機械工程學系] 期刊論文

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