| STUDY ON THE INITIATION AND PROPAGATION OF REHEAT CRACK |
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| 作者姓名： | Yao Shoushan Wu Luhai |
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| 摘 要： | 11ntroductionTherearestilldifferentviewpointsaboutthemechanismofreheatcracking(alsocalledstress-reliefcrack)inrecentyears.Somescien-tiststhinkthatreheatcrackingismainlycausedbyprecipitationstrengtheningrainduringstress-relieftreatment.Somestressthatreheatcrackingismainlyresultedfromtheintercrystal-linesegregationofsomeharmfulelementswhichmaycauseintercrystallinebrittleness.Andmoreothersprefertoexplaintheinitiationofreheatcrackingwithcreeptheory.Thetheoryaboutcreepruptureincludesstressconcentra…
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STUDY ON THE INITIATION AND PROPAGATION OF REHEAT CRACK |
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| Yao Shoushan, Wu Luhai.STUDY ON THE INITIATION AND PROPAGATION OF REHEAT CRACK[J].Journal of Shanghai Jiaotong university,1996(2). |
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| Authors: | Yao Shoushan Wu Luhai |
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| Institution: | Dept. of Materials Engineering |
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| Abstract: | The stress-relaxation test and slow tensile test of simulated weld coarse grain heat affected zone(CGHAZ) of steels 15CrMoV, 18MnMoNiNb and 12Ni3CrMoV are carried out at reheat temperature. Themetallographic characteristics and the fracture feature of reheat crack are investigated. The results show thatthe fracture characteristics of the initiation and propagation of reheat cracking have a certain regularity. |
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| Keywords: | reheat crack stress-relief crack CGHAZ |
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