Microstructure and mechanical properties of ZrBe alloys processed by hot rolling
Microstructure and mechanical properties of ZrBe alloys processed by hot rolling
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热轧ZrBe合金的显微组织和力学性能
DOI：
10.1016/j.msea.2016.05.017
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发表时间：
2016
期刊：
影响因子：
6.4
通讯作者：
R. P. Liu
中科院分区：
文献类型：
--
作者：
Z. H. Feng;C. Q. Xia;R. Jing;X. J. Jiang;Y. K. Zhou;H. Zhong;X. Y. Zhang;M. Z. Ma;R. P. Liu
本文研究了Be含量对热轧ZrBe二元合金组织和力学性能的影响。采用x射线衍射（XRD）、光学显微镜（OM）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对合金的微观结构进行了表征。在相同处理温度下，随着Be含量的增加，α -变化马氏体和Be2Zr化合物的体积分数逐渐增大，而α相的体积分数逐渐减小。这主要是由于be在Zr合金中的溶解度较低，α到β相变温度降低所致。同时，随着Be含量的增加，Be2Zr的平均粒径呈增大趋势。随着Be含量的增加，拉伸强度增加，塑性降低。当Be含量为1.0 wt%时，合金的抗拉强度最高（892 MPa），伸长率为7.06%。讨论了热轧ZrBe合金的强化和增韧机理。
In the present study, the effects of Be content on the microstructure and mechanical properties of hot rolled ZrBe binary alloys were investigated. Microstructures, i.e. the phases present in the alloys, were characterized using X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). At the same processing temperature, the volume fraction of α׳ martensite and Be2Zr compound gradually increases but the volume fraction of α phase decreases with increasing Be content. This can be attributed to the low solubility of Be in Zr alloys and the decrease of α to β phase transition temperature. Simultaneously, the average Be2Zr particles size shows an increasing trend with adding Be content. With increasing Be content, the tensile strength increases but ductility decreases. The alloy with 1.0 wt% Be possessed highest ultimate tensile strength (892 MPa) with an elongation of 7.06%. The strengthening and toughening mechanisms of hot-rolled ZrBe alloys were also discussed.