Investigation on micromechanism and stress state effects on cleavage fracture of ferritic-pearlitic steel at −196 °C

详细信息    查看全文

• 作者：Jinshan He ; Junhe Lian ; ^{Junhe.Lian@iehk.rwth-aachen.de} ; Georg Golisch ; An He ; Yidu Di ; Sebastian Mü ; nsterman
• 关键词：Cleavage fracture ; Stress triaxiality ; Lode angle ; Equivalent plastic strain
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：16 February 2017
• 年：2017
• 卷：686
• 期：Complete
• 页码：134-141
• 全文大小：2230 K
• 卷排序：686

文摘

Mechanical tests of a ferritic-pearlitic steel were conducted at −196 °C with various specimen geometries resulting in different stress states. Elastic-plastic finite element method (FEM) simulations were used to analyze the local stress and strain distributions of the studied steel. It is found that cementite lamellae are the initiation sites for cleavage fracture. In addition, the cleavage fracture critical stage and the local equivalent plastic strain at initiation site varies with stress triaxiality and Lode angle.