理化检验：物理分册2012，Vol.48Issue(8)：495-499,503,6.
不锈钢晶间腐蚀弯曲评价方法的影响因素
Influencing Factors of Bending Assessment Method for Intergranular Corrosion of Stainless Steels
摘要
Abstract
The finite element method （FEM） based on GTN damage model was used to investigate the effects of mechanical properties of materials, bending angle and pressure head diameter on plastic strain distribution, ductile damage and crack initiation of bending specimens for assessing intergranular corrosion of stainless steels. The results show that the tensile plastic strain in the specimens increases with the increasing of bending angle and decreasing of pressure head diameter, and the specimens become easier to crack. For the fixed bending angle and pressure head diameter in the assessment standard for intergranular corrosion, cracks may initiate during bending for some stainless steels with lower plasticity, toughness and fracture resistance. So the effects of the mechanical properties of materials on the bending assessment results for intergranular corrosion should be considered. For the typical austenitic stainless steel in this study, when its bending fracture strain is less than about 0. 51, cracks may occur during bending test. In this case, the bending method may not be suitable for assessing the intergranular corrosion of stainless steels.关键词
晶间腐蚀/弯曲/力学性能/弯曲角度/压头直径Key words
intergranular corrosion/bending/mechanical property/bending angle/pressure head diameter分类
金属材料引用本文复制引用
邱智伟,王国珍,轩福贞..不锈钢晶间腐蚀弯曲评价方法的影响因素[J].理化检验：物理分册,2012,48(8):495-499,503,6.基金项目
上海市重点科技攻关项目子课题 （）
国家自然科学基金资助项目 （）
