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振动时效机理研究
引用本文:焦馥杰,茅鹏,沈瑜书.振动时效机理研究[J].焊接学报,1992,13(3):169-174.
作者姓名:焦馥杰  茅鹏  沈瑜书
作者单位:上海工程技术大学,上海工程技术大学,上海工程技术大学
摘    要:

关 键 词:振动时效  位错密度  残余应力  焊件
收稿时间:1991/8/15 0:00:00

Investigation of mechanism of vibration ageing
Jiao Fujie,Mao Peng and Shen Yushu.Investigation of mechanism of vibration ageing[J].Transactions of The China Welding Institution,1992,13(3):169-174.
Authors:Jiao Fujie  Mao Peng and Shen Yushu
Affiliation:Shanghai University of Engineering Science
Abstract:Although it was often proposed by a number of investigators that peak residual stresses be reduced when the sum of the residual and vibratory stresses exceeded the yield point of the material, there is n oevidence observed from studies to prove that the vibration ageing would cause the attendant plastic deformation. Based on the dislocation theory, it was explained that after vibration ageing the relief degree of the residual stress depended on the change of the dislocation density of the metallic material. Because of the change of the dislocation density, the resistance to plastic flow was increased and the dimension stability of weldment was improved.
Keywords:vibrational ageing  dislocation density  residual stress relief  
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