摘要
室温下对TA2/Q345爆炸复合板进行静态拉伸和动载拉-压高周疲劳试验,分析其拉伸和疲劳力学性能;用金相显微镜、扫描电镜对TA2/Q345复合板界面金相组织和拉伸、疲劳断口进行分析。结果表明:结合界面至基材Q345显微组织演变为等轴细晶区、纤维状变形组织区、扭曲原始组织、原始组织区(铁素体和珠光体条带);结合界面至覆材TA2表面,出现孪晶组织。拉伸断口为韧性断裂,结合界面波状分离;疲劳断口为准解理断裂,疲劳断裂的应力远低于静态拉伸。
At room temperature,the tensile and fatigue properties of the TA2/Q345 explosive composite plate were studied through static tensile and tension-compression high-cycle fatigue tests. Metallographic microstructure,tensile fracture and fatigue fracture were analyzed by metallographic microscope and scanning electron microscope(SEM). The results show that the microstructure evolution from the interface to the substrate Q345 was as follows:Equiaxial fine grain,fibrous deformed microstructure,twisted primitive microstructure,and primitive microstructure(ferrite and pearlite strip). Twin structure appears on the surface of cladding material TA2 at the binding interface. The tensile fracture is ductile and wavy separation occurs at the interface. The fatigue fracture is quasi cleavage fracture and the stress of fatigue fracture is much lower than that of static tensile fracture.
作者
孙倩
陈菁
崔晓玉
范蕙萍
张罡
SUN Qian;CHEN Jing;CUI Xiaoyu;FAN Huiping;ZHANG Gang(Qindao College,Qingdao University of Technology.Qingdao 266106,China;Shenyang Ligong University,Shenyang 110159,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2021年第3期128-132,共5页
Ordnance Material Science and Engineering
基金
辽宁省金属材料先进加工技术重点实验室开放基金(L2015470)。
关键词
静态拉伸
高周疲劳
孪晶
static tension
high cycle fatigue
twin crystal
作者简介
第一作者:孙倩,女,硕士,讲师,主要从事材料的疲劳与断裂研究。E-mail:434577265@qq.com;通信作者:张罡,男,教授,主要从事焊接及材料表面PVD方面研究。E-mail:gangzhang_imr@163.com。
