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三维机织预制体结构对C/C复合材料力学性能的影响 被引量:4
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作者 杨彩云 胡振英 周红英 《材料工程》 EI CAS CSCD 北大核心 2009年第9期29-32,37,共5页
本工作设计并用炭纤维织造了两种不同结构的三维预制体,即三维角联锁结构(JLS)和三向正交结构(SZJ),采用化学气相渗透(CVI)致密和液相树脂浸渍/炭化的增密工艺,制备出C/C复合材料,测试并对比分析了拉伸性能和冲剪性能。结果表明:预制体... 本工作设计并用炭纤维织造了两种不同结构的三维预制体,即三维角联锁结构(JLS)和三向正交结构(SZJ),采用化学气相渗透(CVI)致密和液相树脂浸渍/炭化的增密工艺,制备出C/C复合材料,测试并对比分析了拉伸性能和冲剪性能。结果表明:预制体结构对C/C复合材料的力学性能有很大影响,同时决定拉伸断裂破坏模式。三向正交结构C/C复合材料的力学性能好于三维角联锁结构的C/C复合材料。 展开更多
关键词 C/C复合材料 三维机织预制体 力学性能 增强体结构 拉伸断裂模式
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Quasi-static and dynamic tensile behaviors in electron beam welded Ti-6Al-4V alloy
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作者 张静 谭成文 +2 位作者 任宇 王富耻 才鸿年 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第1期39-44,共6页
The quasi-static and dynamic tensile behaviors in electron beam welded(EBW) Ti-6Al-4V alloy were investigated at strain rates of 10-3 and 103 s-1,respectively,by materials test system(MTS) and reconstructive Hopki... The quasi-static and dynamic tensile behaviors in electron beam welded(EBW) Ti-6Al-4V alloy were investigated at strain rates of 10-3 and 103 s-1,respectively,by materials test system(MTS) and reconstructive Hopkinson bars apparatus.The microstructures of the base metal(BM) and the welded metal(WM) were observed with optical microscope.The fracture characteristics of the BM and WM were characterized with scanning electronic microscope.In Ti-6Al-4V alloy joint,the flow stress of WM is higher than that of BM,while the fracture strain of WM is less than that of BM at strain rates of 103 and 10-3 s-1,respectively.The fracture strain of WM has apparent improvement when the strain rate rises from 10-3 to 103 s-1,while the fracture strain of BM almost has no change.At the same time,the fracture mode of WM alters from brittle to ductile fracture,which causes improvement of the fracture strain of WM. 展开更多
关键词 Ti-6Al-4V alloy electron beam welding quasi-static tensile behavior dynamic behavior fracture mode
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Fracture pattern evolution of SnAgCu−SnPb mixed solder joints at cryogenic temperature 被引量:4
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作者 Ming WU Shan-lin WANG +3 位作者 Wen-jun SUN Min HONG Yu-hua CHEN Li-ming KE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第9期2762-2772,共11页
The effect of cryogenic temperatures on the mechanical properties and fracture mechanism of SnAgCu−SnPb mixed solder joints was investigated.The results showed that the tensile strength of mixed solder joints first in... The effect of cryogenic temperatures on the mechanical properties and fracture mechanism of SnAgCu−SnPb mixed solder joints was investigated.The results showed that the tensile strength of mixed solder joints first increased with the increase of Pb content and reached its maximum at 22.46 wt.%Pb;subsequently,it decreased as Pb content increased.However,cryogenic temperatures improved the tensile strength of the solder joints.Both Pb content and cryogenic temperature caused the fracture mode of the mixed solder joints to change;however,temperature remained the main influencing factor.As the temperature fell from 298 to 123 K,the failure pattern in the solder joints transformed from ductile fracture to quasi-ductile fracture to quasi-brittle fracture and finally,to brittle fracture. 展开更多
关键词 fracture pattern tensile strength SnAgCu−SnPb solder cryogenic temperature
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