冷加工316L不锈钢裂尖力学状态分析  

Analysis of Mechanical State at Crack Tip of Cold Working 316L Stainless Steel

作　　者：樊亚玲[1] 杨宏亮[2] Fan Yaling;Yang Hongliang(Xi'an Railway Vocational and Technical Institute,Xi'an,Shaanxi 710014;Xian University of Science and Technology,Xi'an,Shaanxi 710054,China)

机构地区：[1]西安铁路职业技术学院,陕西西安710026 [2]西安科技大学,陕西西安710054

出　　处：《西安铁路职业技术学院学报》2019年第3期5-8,25,共5页Journal of Xi’an Railway Vocational & Technical Institute

基　　金：陕西省教育厅科研计划资助项目(16JK1493)。

摘　　要：为了解冷加工对316L不锈钢裂尖力学特性的彩响,采用有限元模拟方法,分析了单轴拉伸和冷轧-拉伸冷加工不锈钢应力腐蚀裂尖应力-应变状态。结果表明:随着冷加工量的增加,单轴拉伸和冷轧-拉伸裂尖Mises应力、等效塑性应变、拉伸应力和拉伸应变均有不同程度的增大。预冷轧改变了316L的力学参量,因而影响了裂尖应力-应变状态,拉伸变形量相同时,冷轧-拉伸裂尖应力应变均在不同程度上大于单轴拉伸裂尖应力应变,但随着拉伸变形量的增加,冷轧-拉伸和单轴拉伸裂尖应力差逐渐减小,应变差有所增加,冷加工在一定程度上可加剧应力腐蚀开裂。In order to study the effect of cold working on the mechanical properties of 316L stainless steel,finite element simulation was used to analyze stress-strain state of stainless steel crack tip in stress corrosion cracking under uniaxial tension and cold rolling-tension.The results show that Mises stress,equivalent plastic strain,tensile stress and tensile strain of uniaxial tension and cold rolling-tensile increase in different degrees with the increasing of cold working level.The pre-cold rolling changes the mechanical parameters of 316L,which affects the stress state of crack tip.The stress and strain of cold rolling-tension at crack tip are higher than that of uniaxial tension in different degree at same tensile deformation.However,with the increasing of the tensile deformation,the stress level gap between the cold rolling-ension and the uniaxial tensile at crack tip decreases and the strain level gap increases.Cold working can increase stress corrosion cracking to some degree.

关 键 词：应力腐蚀 冷加工 应力应变 力学状态 316L不锈钢 

分 类 号：TG174.3[金属学及工艺—金属表面处理]