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首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanical Property Characterization of Cryo-Rolled Copper by Miniaturized Disk Bend and Nanoindentation Technique
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Mechanical Property Characterization of Cryo-Rolled Copper by Miniaturized Disk Bend and Nanoindentation Technique

机译：微型圆盘弯曲和纳米压痕技术表征冷轧铜的力学性能

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摘要

The present study reports mechanical behavior of severe plastically deformed pure Cu under cryogenic conditions by miniaturized disk bend test (MDBT) and nanoindentation technique. MDBT is a useful technique to determine mechanical property of miniature samples under multiaxial state of stress. The samples were severely deformed by cryo-rolling upto 75% and 95% reduction. Microstructure evolution of cryo-rolled samples has been characterized using optical and EBSD technique. MDBT was performed on cryo-rolled 10-mm disk of similar to 200-mu m thickness. Nanoindentation tests were also performed on the cryo-rolled samples. The hardness values obtained from nanoindentation tests were compared with yield stress obtained from MDBT. The present study established a good quantitative correlation between the two techniques. Mechanical dynamic parameters; strain rate sensitivity (m) and activation volume (V*) determined by MDBT and nanoindentation techniques showed close agreement in the results.
机译：本研究通过微型圆盘弯曲试验（MDBT）和纳米压痕技术报道了在低温条件下严重塑性变形纯铜的力学行为。 MDBT是确定多轴应力状态下微型样品力学性能的有用技术。样品通过冷轧而变形严重，变形率高达75％和95％。低温轧制样品的微观结构演变已使用光学和EBSD技术进行了表征。 MDBT在类似于200微米厚度的10毫米冷轧圆盘上进行。还对冷轧样品进行了纳米压痕测试。将通过纳米压痕测试获得的硬度值与通过MDBT获得的屈服应力进行比较。本研究在两种技术之间建立了良好的定量相关性。机械动力学参数;通过MDBT和纳米压痕技术测定的应变速率敏感性（m）和活化体积（V *）在结果中显示出非常一致的结果。

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