研究员 博士生导师 硕士生导师
任职 : 爆炸技术研究所所长
性别: 男
毕业院校: 中国科学技术大学
学位: 博士
所在单位: 力学与航空航天学院
学科: 工程力学
办公地点: 力学楼224室
联系方式: 041184706163 科研之友主页: https://www.scholarmate.com/P/JzE7ru
电子邮箱: robinli@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2021-07-21
发表刊物: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷号: 117
期号: 4
页面范围: 1941-1946
ISSN号: 0947-8396
摘要: We show direct evidence that underwater shock wave enables us to bond multithin plates with flat, parallel, and high-strength interfaces, which are key requirements for functionally graded material (also called graded density impactor). This phenomenon is ascribed to the super short duration of the high-speed underwater shock wave, reducing the surface tension, diffusion, evaporation, deposition, and viscous flow of matter. Thin magnesium, aluminum, titanium, copper, and molybdenum foils were welded together and designed with the increase in density. Experimental evidence and numerical simulation show that well bonding between the multilayer structures. Microstructure examinations reveal that the dominant interfacial form shifts from waviness to linearity. Graded density impactor with multilayer structure is proved that can produce quasi-isentropic compression in two-stage gas gun experiment with a designed pressure loading profile, which suggests a feasible method to simulate the conditions we want to study that were previously inaccessible in a precisely controlled laboratory environment.