Micro/nanostructure high strength and high conductivity CuCrZr alloy prepared through equal channel angular pressing and aging treatment
Micro/nanostructure high strength and high conductivity CuCrZr alloy prepared through equal channel angular pressing and aging treatment
复制标题
等通道角压制时效处理制备微纳结构高强高导CuCrZr合金
DOI：
10.1016/j.mtcomm.2022.104381
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发表时间：
2022-09-07
影响因子：
3.8
通讯作者：
Jia, Zhi
中科院分区：
文献类型：
--
作者：
Guo, Tingbiao;Gao, Yang;Jia, Zhi
严重塑性变形(SPD)和时效处理严重影响组织、析出相的分布，进而严重影响CuCrZr合金的综合性能。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、电子背散射衍射仪(EBSD)和透射电子显微镜(TEM)研究了C路径变形时效等通道转角挤压(ECAP)后的组织、取向、织构特征和析出相结构。结果表明，ECAP后，初始等轴晶逐渐沿挤压方向转变为纤维状组织，随着应变的增加，织构经历了强烈的起伏，部分取向晶内出现连续孪晶，初始的{112}<；111>；铜织构转变为较强的{110}<；001>；GoS织构。时效处理加剧了晶界纳米析出物的不连续分布，经过4道道次和450C时效4h后，强度、硬度和电导率分别达到577.2 Mpa、184.5Hv和78.5%Iacs，并呈现持续增加的趋势。
Severe plastic deformation (SPD) and aging treatment seriously affect the microstructure, precipitation phase distribute then seriously affect comprehensive properties of CuCrZr alloy. The microstructure, orientation, texture characteristics, and precipitated phase structure after equal channel angular pressing (ECAP) by route C deformation and aging treatment were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), electron back-scattered diffraction (EBSD) and transmission electron microscope (TEM). The results show that, after ECAP the initial equiaxial crystal gradually transformed into fibrous structure along the extrusion direction, with the increasing strain, the texture undergoes a strong undulation, continuous twinning occurs within some oriented grains, with an initial {112}< 111 > copper texture that transformed to a stronger {110}< 001 > Goss texture. Aging treatment can intensify discontinuity distribution of nanoscale precipitation along grain boundaries; After 4 passes and aging at 450 celcius for 4 h the strength, hardness and conductivity reached to 577.2 MPa, 184.5Hv and 78.5%IACS, respectively, and showed a continuous increasing trend.