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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27124


    Title: POST WELD HEAT-TREATMENT EFFECTS ON FATIGUE-CRACK PROPAGATION IN AN ELECTRON-BEAM WELDMENT
    Authors: HWANG,JR;JENG,MC;WANG,CC
    Contributors: 機械工程學系
    Keywords: GROWTH;STEEL
    Date: 1993
    Issue Date: 2010-06-29 18:08:22 (UTC+8)
    Publisher: 中央大學
    Abstract: 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.
    Relation: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
    Appears in Collections:[機械工程研究所] 期刊論文

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