An interface shear damage model of chromium coating/steel substrate under thermal erosion load

作     者：Xiao-long Li Yong Zang Yong Lian Min-yu Ma Lei Mu Qin Qin Xiao-long Li;Yong Zang;Yong Lian;Min-yu Ma;Lei Mu;Qin Qin

作者机构：School of Mechanical EngineeringUniversity of Science and Technology BeijingBeijing100083China Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Beijing Key Laboratory for CorrosionErosion and Surface TechnologyBeijing100083China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2021年第17卷第2期

页      面：405-415页

核心收录：

学科分类：08[工学] 0826[工学-兵器科学与技术] 

主　　题：Cr coating/steel substrate Thermal erosion Finite element simulation Ultimate shear strength Interface shear damage model 

摘      要：The Cr-plated coating inside a gun barrel can effectively improve the barrel’s erosion resistance and thus increase the service ***,due to the cyclic thermal load caused by high-temperature gunpowder,micro-element damage tends to occur within the Cr coating/steel substrate interface,leading to a gradual deterioration in macro-mechanical properties for the material in the related *** order to mimic this cyclic thermal load and,thereby,study the thermal erosion behavior of the Cr coating on the barrel’s inner wall,a laser emitter is utilized in the current *** the help of in-situ tensile test and finite element simulation results,a shear stress distribution law of the Cr coating/steel substrate and a change law of the interface ultimate shear strength are *** have shown that the Cr coating/steel substrate interface’s ultimate shear strength has a significant weakening effect due to increasing *** this study,the interfacial ultimate shear strength decreases from 2.57 GPa(no erosion)to 1.02 GPa(laser power is 160 W).The data from this experiment is employed to establish a Cr coating/steel substrate interface shear damage *** this model is used to predict the flaking process of Cr coating by finite element *** simulation results show that the increase of coating crack spacing and coating thickness will increase the service life of gun barrel.