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Influence of Ag micro-alloying on the thermal stability and ageing characteristics of a Cu-14Fe in-situ composite

机译：Ag微合金化对Cu-14Fe原位复合材料热稳定性和时效特性的影响

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摘要

This paper studied the influence of Ag micro-alloying on the thermal stability and ageing characteristics of a deformation-processed Cu-14Fe in-situ composite prepared by thermo-mechanical processing. Heat treatment caused (ⅰ) edge recession, longitudinal splitting, cylinderization, break-up and spheroidisation of the Fe fibres in the Ag micro-alloyed Cu-14Fe in-situ composite, and (ⅱ) recovery, recrystallisation and precipitation in the Cu matrix. Ag micro-alloying caused these processes to occur at lower temperatures. The index Z (a combination figure of merit that assesses the service performance) reached the peak value of 3.3 × 10~7 MPa~2 · % IACS after isothermal heat treatment at 500 ℃ for 1 h, where IACS is the International Annealed Copper Standard, a measure of conductivity. The optimum combinations of tensile strength and conductivity were 1033 MPa and 56.6% IACS; 931 MPa and 58.9% IACS; or 851 MPa and 60.6% IACS. The tensile strength and conductivity of Ag micro-alloyed Cu-14Fe in-situ composite at η=7.8 after isochronal heat treatments were higher than those of the Cu-14Fe in-situ composite at each temperature.
机译：本文研究了银微合金化对热机械加工形变的Cu-14Fe原位复合材料的热稳定性和时效特性的影响。热处理引起（34）Ag微合金化的Cu-14Fe原位复合材料中的Fe纤维的边缘退缩，纵向断裂，圆柱化，破裂和球化，以及（Cu）Cu基体的恢复，重结晶和沉淀。银微合金化导致这些过程在较低的温度下发生。在500℃等温热处理1 h后，指标Z（评估服务性能的综合指标）达到3.3×10〜7 MPa〜2·％IACS的峰值，其中IACS是国际退火铜标准。 ，电导率的量度。拉伸强度和导电率的最佳组合为1033 MPa和56.6％IACS； 931 MPa和58.9％IACS;或851 MPa和60.6％IACS。等温热处理后，η= 7.8时，Ag微合金化Cu-14Fe原位复合材料的拉伸强度和导电率在各个温度下均高于Cu-14Fe原位复合材料。

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  • 来源
    《Materials Science and Engineering》 |2016年第15期|1-7|共7页
  • 作者

    Kerning Liu; Zhikai Huang; Xingwang Zhang; Deping Lu; Andrej Atrens; Haitao Zhou; Yi Yin; Jiuming Yu; Wei Guo;

  • 作者单位

    Jiangxi Key Laboratory for Precision Actuation and Control, Nanchang Institute of Technology, Nanchang 330099, PR China,Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, PR China;

    Jiangxi Key Laboratory for Precision Actuation and Control, Nanchang Institute of Technology, Nanchang 330099, PR China;

    Jiangxi Key Laboratory for Precision Actuation and Control, Nanchang Institute of Technology, Nanchang 330099, PR China;

    Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, PR China;

    Division of Materials Engineering, The University of Queensland, Brisbane, QLD 4072, Australia;

    School of Materials Science and Engineering, Central South University, Changsha 410083, PR China;

    Jiangxi Key Laboratory for Precision Actuation and Control, Nanchang Institute of Technology, Nanchang 330099, PR China;

    Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, PR China;

    Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, PR China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Cu-14Fe; Ag micro-alloying; Microstructure; Thermal stability; Ageing characteristics;

    机译：铜-14Fe;银微合金化;微观结构热稳定性;老化特性;

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