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Analysis of stored energy in cold-rolled copper using bulk and microstructure-based techniques
  • ISSN号:1006-7191
  • 期刊名称:Acta Metallurgica Sinica (English Letters)
  • 时间:0
  • 页码:-
  • 分类:TG335.12[金属学及工艺—金属压力加工] TL629.1[核科学技术—核技术及应用]
  • 作者机构:Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University,Beijing 100084, China
  • 相关基金:Acknowledgments The authors gratefully acknowledge the support from the Danish National Research Foundation (No. DNRF86-5) and the National Natural Science Foundation of China (Nos. 51261130091 and 51171085) to the Danish-Chinese Center for Nanometals.
  • 相关项目:高摩擦滑动变形制备金属材料的梯度纳米结构及细化极限研究
中文摘要:

存储精力的大小用两微分扫描热量测定(DSC ) 为对在 0.42 和 5.21 之间的 von 协定紧张滚动寒冷的铜的样品被获得了,并且基于在传播电子显微镜(TEM ) 的微结构参数的大小。在两个盒子中,有紧张的存储精力的线性增加被发现。然而,在二测量价值之间的比率在一个重要范围上变化,显示一些小心在决定在与在一件给定的样品的变丑微观结构异质联系的精力的相对差别被需要。有流动压力的存储精力的比较建议基于 TEM 的大小反映为流动压力负责的脱臼密度内容,但是 DSC 技术另外测量另外的贡献到存储精力,例如平衡内部压力的存在。

英文摘要:

Measurements of stored energy have been obtained for samples of copper cold-rolled to von Mises strains between 0.42 and 5.21 using both differential scanning calorimetry (DSC), and based on measurements of microstructural parameters in the transmission electron microscope (TEM). In both cases, a linear increase in stored energy with strain is found. The ratio between the two measured values varies, however, over a significant range, indicating that some caution is needed in determining the relative difference in energy associated with deformation microstructure heterogeneities in a given sample. Comparison of the stored energy with the flow stress suggests that the TEM-based measurements reflect the dislocation density content responsible for the flow stress, but that the DSC technique additionally measures other contributions to the stored energy, such as the presence of balanced internal stresses.

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期刊信息
  • 《金属学报:英文版》
  • 中国科技核心期刊
  • 主管单位:中国科协
  • 主办单位:中国金属学会
  • 主编:
  • 地址:沈阳文华路72号
  • 邮编:110016
  • 邮箱:jsxb@imr.ac.cn
  • 电话:024-23971286
  • 国际标准刊号:ISSN:1006-7191
  • 国内统一刊号:ISSN:21-1361/TG
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:286