Fast penetration of liquid metal into solid metal and liquid metal embrittlement

液态金属快速渗透到固态金属和液态金属脆化

• 批准号: 13650725
• 负责人: KOIZUMI Hirokazu
• 金额: $ 1.98万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650725/
• 关键词: liquid metal embrittlement; solid metal induced embrittlement; grain boundaries; polycrystalline metals; intergranular fracture; fast penetration; brittle fracture; incubation period; 特異性; 多結晶; 粒界; アルミニウム; ガリウム

For some solid metal-liquid metal couples that exhibit liquid metal embrittlement, penetration of the embrittling liquid metal along grain boundaries of the solid metal is observed. Penetration speed of liquid gallium into aluminum and that of mercury into silver and copper were measured by using thin evaporated films. The degree of embrittlement induced by the liquid metal was estimated by tensile tests. The tensile specimens were kept in contact with the liquid metal for various times of exposure, and then the embrittler was removed before the test. For aluminum and gallium pair, these measurements were performed at low temperatures where gallium is solid. When the exposure time is short, no sign of embrittlement is observed. As the exposure time increases further, the brittle fracture surface area increases with logarithm of the exposure time. The results imply the existence of an incubation period, which is inversely proportional to the Penetration speed of embrittling low melting temperature metals.

对于某些表现出液态金属含量的固体金属液夫妇，可以观察到沿固体金属晶界的含有液体金属的渗透。通过使用薄蒸发膜测量液体壳中的液体和汞含量为银和铜的渗透速度。通过拉伸测试估算了由液态金属诱导的互惠度。拉伸标本与液态金属保持接触，以进行各个暴露时间，然后在测试前取出了Emberittler。对于铝和甘露对，这些测量是在凝固着耐与固体的低温下进行的。当暴露时间很短时，就没有观察到脆弱的迹象。随着暴露时间的进一步增加，随着暴露时间的对数，脆性断裂表面积会增加。结果意味着存在一个孵化期，这与覆盖低熔化温度金属的穿透速度成反比。