...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of two-step cryorolling and aging on mechanical and electrical properties of a Cu-Cr-Ni-Si alloy for lead frames applications
【24h】

Effect of two-step cryorolling and aging on mechanical and electrical properties of a Cu-Cr-Ni-Si alloy for lead frames applications

机译：两步低温和老化对铅框架应用Cu-Cr-Ni-Si合金机械和电性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High strength and high electrical conductivity Cu-Cr-based alloys are important candidate materials for preparing lead frames, railway contact wires and connects. However, high strength and high electrical conductivity are mutually exclusive in nature. To optimize the mechanical and electrical properties of a Cu-Cr-Ni-Si alloy, the two-step cryorolling and aging (CRA) was carried out in this study. Here, by the analysis of microstructure evolution, precipitation behavior, and corresponding strengthening mechanisms of the alloy at different rolling and aging conditions, we find that the yield strength and electrical conductivity for the two-step CRA sample are improved by 91.3 MPa and 4.9 %IACS (International Annealed Copper Standard) than those of the sample subjected to single-step room temperature rolling and aging (RTRA). The higher yield strength for the two-step CRA sample is mainly determined by the precipitation strengthening contributed from Ni_2Si and Cr precipitates, rather than the twin boundary strengthening and dislocation strengthening. In fact, the dislocation density of the two-step CRA sample is lower than that of the single-step RTRA sample because of the faster drop rate of recovery, which weakens the effect of dislocation strengthening. The combination of the first-step aging and second-step CR process for the two-step CRA sample contributes to the formation of more precipitates from the matrix, thereby significantly increasing the precipitation strengthening and decreasing the impurity scattering in the final aging. The results provide a new preparation process and a reliable theoretical approach for optimizing the mechanical and electrical properties of the Cu-Cr alloys.
机译：高强度和高导电性Cu-Cr基合金是用于制备铅框架，铁路接触线和连接的重要候选材料。然而，高强度和高导电性在自然界中相互排斥。为了优化Cu-Cr-Ni-Si合金的机械和电性能，在本研究中进行了两步低温和老化（CRA）。这里，通过分析不同轧制和老化条件下合金的微观结构演化，沉淀行为和相应的强化机制，我们发现两步CRA样品的屈服强度和电导率得到91.3MPa和4.9％ IACS（国际退火铜标准）比对单步室温轧制和老化的样品（RTRA）的样品。两步CRA样品的屈服强度主要由Ni_2Si和Cr沉淀的贡献，而不是双边界强化和脱位强化决定。实际上，由于较快的恢复速率，两步CRA样品的位错密度低于单步rtra样品的脱位密度，这削弱了脱位强化的效果。两步CRA样品的第一步老化和第二步骤CR方法的组合有助于形成来自基质的更多沉淀物，从而显着提高沉淀强化并降低最终老化中的杂质散射。结果提供了一种新的制备方法和可靠的理论方法，用于优化Cu-Cr合金的机械和电性能。

著录项

  • 来源
    《Materials Science and Engineering》 |2021年第30期|140521.1-140521.11|共11页
  • 作者

    Xinglong Sun; Jinchuan Jie; Tongmin Wang; Tingju Li;

  • 作者单位

    Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China;

    Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China Ningbo Institute of Dalian University of Technology Ningbo 315000 China;

    Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China Ningbo Institute of Dalian University of Technology Ningbo 315000 China;

    Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China Ningbo Institute of Dalian University of Technology Ningbo 315000 China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cu-Cr-Ni-Si alloy; Two-step cryorolling and aging; Microstructure evolution; Precipitation behavior; Yield strength;

    机译：Cu-Cr-Ni-Si合金;两步低温和老化;微观结构演变;降水行为;屈服强度;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号