Enhanced Mechanical Properties of Pure Zirconium via Friction Stir Processing
Enhanced Mechanical Properties of Pure Zirconium via Friction Stir Processing
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DOI：
10.1007/s40195-019-00939-7
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Wen Wang;P. Han;Jie Yuan;Pai Peng;Qiang Liu;Fei Qiang;K. Qiao;Kuai-She Wang
中科院分区：
文献类型：
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作者：
Wen Wang;P. Han;Jie Yuan;Pai Peng;Qiang Liu;Fei Qiang;K. Qiao;Kuai-She Wang
搅拌摩擦加工（FSP）作为一种新型的剧烈塑性变形技术，可以细化和均匀化金属材料的微观结构。在本研究中，通过电子背散射衍射分析、显微硬度和室温拉伸测试研究了FSP对纯Zr显微组织和力学性能的影响。加工区获得平均晶粒尺寸 ~ 5.3μm的细晶（FG）组织，平均显微硬度为 ~ 198 HV，是母材的1.6倍。此外，由于织构强，FG纯Zr的拉伸性能表现出明显的各向异性。晶粒尺寸和织构对FG纯Zr的强度和延展性都有显着影响。获得了高屈服强度（248 MPa）和极限拉伸强度（483 MPa）以及良好的均匀伸长率（10%），这表明FSP是制备具有高强度和良好延展性的块状FG纯Zr的有效方法。
Friction stir processing (FSP), as a new kind of severe plastic deformation technique, can refine and homogenize the microstructure of metallic material. In this study, the effect of FSP on the microstructure and mechanical properties of pure Zr was investigated using electron backscatter diffraction analysis, microhardness and room-temperature tensile testing. The fine-grained (FG) structure with an average grain size of ~ 5.3 μm was obtained in the processed zone, where the average microhardness was ~ 198 HV, 1.6 times higher than that of base metal. Furthermore, tensile property of FG pure Zr exhibited obvious anisotropy owing to strong texture. Both grain size and texture had a significant effect on strength and ductility of FG pure Zr. High yield strength (248 MPa) and ultimate tensile strength (483 MPa), as well as good uniform elongation (10%) were achieved, which demonstrated that FSP was an effective method to fabricate bulk FG pure Zr with high strength and good ductility.