POST WELD HEAT-TREATMENT EFFECTS ON FATIGUE-CRACK PROPAGATION IN AN ELECTRON-BEAM WELDMENT

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题名:	POST WELD HEAT-TREATMENT EFFECTS ON FATIGUE-CRACK PROPAGATION IN AN ELECTRON-BEAM WELDMENT
作者:	HWANG,JR;JENG,MC;WANG,CC
贡献者:	機械工程學系
关键词:	GROWTH;STEEL
日期:	1993
上传时间:	2010-06-29 18:08:22 (UTC+8)
出版者:	中央大學
摘要:	This paper studies the effect of two post-weld heat treatment processes on the fatigue behaviour of an electron beam weldment in 9 mm AISI 4130 steel. Electron beam tempering, in a vacuum chamber, immediately after welding and a traditional furnace tempering treatment were compared. Fatigue crack propagation resistance was assessed by a linear elastic fracture mechanics analysis. The resistance to fatigue crack growth was improved with post weld heat treatment due to residual stress relief and the existence of a toughened tempered microstructure. The specimens with an electron beam post-weld heat treatment showed better fatigue properties than those of furnace-treated specimens. An electron beam post-weld heat treatment causes the fatigue crack growth rate to decrease with increasing energy input and decreasing micro-dot-pattern width. For a furnace post-weld heat treatment, the fatigue crack growth rate decreases with increasing tempering temperature.
關聯:	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
显示于类别:	[機械工程研究所] 期刊論文

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