文献类型：期刊文献

英文题名：A Noval Model for Strain-Controlled Fracture to Evaluate the Fracture Behavior in Strip Martensite Steel

作者：Shao-Lei, Long Yi, Yanliang Shan, Wu Ling, Min Xiao, Long Qin, Gui Yi-Long, Liang

第一作者：Shao-Lei, Long

机构：[1] School of Materials and Energy, Guizhou Institute of Technology, Guizhou, Guiyang, 550003, China; [2] College of Material and Metallurgy, Guizhou University, Guizhou, Guiyang, 550028, China; [3] Institute of Advance Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangdong, Guangzhou, 510632, China; [4] School of Chemistry and Materials science, Guizhou Education University, Guizhou, Guiyang, 550018, China

第一机构：贵州理工学院

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230205939)

语种：英文

外文关键词：Coarsening - Expansion - Fracture mechanics - Martensite - Plasticity

摘要：Because of the limitations of the Hall-Petch equation for strip martensite steel and the complexity of the relationship between macro-plasticity/toughness (MATP) and micro-plasticity/toughness (MITP), a composite parameter model (CPM) was developed considering the strain-controlled fracture ( ). The fracture behavior of strip martensite steel and fracture characteristics were investigated in detail. The results showed that the CPM effectively determined the effective grains of MATP and MITP as laths in the strain-controlled fracture, and the Di of MATP and MITP less than 1, revealing the consistent relationship between MATP and MITP. In addition, since Di was infinite in the stress-controlled fracture, CPM showed no practical significance but effectively revealed the relationship between MATP and MITP. When the effective grains of MATP and MITP were different, the Di value of MATP was greater than 1, and the MITP was less than 1, which reflects the mixed fracture mode. The MATP and MITP showed an inverse relationship with the coarse grain size. When the Di values of MATP and MITP approached infinity, and the effective grains were the same, they demonstrated martensite packet sizes, showing stress-controlled fracture. MATP and MITP showed the same variation with grain coarsening and decreased in size simultaneously. Moreover, CPM and the hole expansion ratio model relation revealed the microscopic characteristics of the macroscopic changes of ductile fracture, providing a new idea for studying the coupling relationship of mechanical properties. ? 2023, The Authors. All rights reserved.