摘要
以1100铝箔以及TA1钛箔为原材料,通过超声固结制备了Ti/Al箔材金属层状复合材料试样,应用准静态拉伸试验研究了Ti/Al叠层复合材料的力学性能与Ti,Al箔材力学性能之间的关系,获得了不同温度条件下的Ti/Al叠层复合材料的力学性能变化规律,利用数码相机记录了Ti/Al叠层复合材料的拉伸变形过程及失效形式,采用扫描电镜(SEM)对其断口进行分析,通过原位三点弯曲试验对其弯曲变形过程进行分析。结果表明,Ti/Al界面成形了可靠的连接,变形性能较好的Ti层带动Al层协调变形,提高了整体的变形能力,延伸率可达31%,随着变形温度的提高,延伸率逐渐降低;室温条件下Ti,Al层清晰可见且开裂,Ti,Al层断口上均布满了大小不等的韧窝,高温条件下Ti,Al开裂不明显,局部的韧窝的尺寸更大;在弯曲变形过程中,裂纹在Ti层、Ti/Al界面的不断转移,吸收变形过程中的能量,延缓了裂纹的扩展。
Ti/Al foil laminated composites pecimens were manufactured using ultrasonic consolidation process with Al 1000 and TA1 titanium foils used as raw material.The mechanical properties of the Ti/Al laminated composites,and correlations of mechanical properties between Ti and Al foil were investigated by qusi-static tensile tests.Variations of mechanical properties of the Ti/Al laminated composite under different temperature conditions were obtained.The tensile deformation field and failure mode of Ti/Al laminated composite were recorded using digital camera.The fracture morphology was observed and analyzed through scanning electron microscope(SEM).In-situ three-point bending tests were performed to analyse the deformation behavior during bending.The results showed that,continuous and stable Ti layer with good formability was formed at the Ti/Al interface,which contributed to the coherent deformation of Al layer and results in the formability of whole structure.The maximum ductility could attain 31%.With the increase of deformation temperature,the ductility decreased gradually.At room temperature,obvious crack between Ti and Al layers could be seen with nonuniformly distributed different sized dimples on the fracture surface.At elevated temperatures,the crack between Ti and Al layers was unobvious,the size of local dimple was bigger.During the deformation of bending,crack occurred at the Ti layer.The continuous shift of Ti/Al interface absorbed energy during the deformation and postponed the propagation of crack.
作者
韩玉杰
姜波
侯红亮
王耀奇
张艳苓
Han Yujie;Jiang Bo;Hou Hongliang;Wang Yaoqi;Zhang Yanling(AVIC Manufacturing Technology Institute,Beijing 100024,China;Aeronautical Key Laboratory for Plastic Forming Technology,Beijing 100024,China;University of Science and Technology Beijing y Beijing 100083,China;Beijing Key Laboratory of Digital Forming Technology and Equipment,Beijing 100024,China)
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2020年第6期597-602,共6页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(11602230)
航空基金项目(2015ZE25006)资助。
关键词
超声波固结
拉伸试验
断口形貌
裂纹扩展
ultrasonic consolidation
tensile test
fracture morphology
crack propagation
