Study on the Structure and Properties of Surface Nanocrystallized Zr-4
Study on the Structure and Properties of Surface Nanocrystallized Zr-4
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DOI：
10.4028/www.scientific.net/amr.415-417.660
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
Conghui Zhang;D. Liu;X. Lan;X. Zhao
中科院分区：
文献类型：
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作者：
Conghui Zhang;D. Liu;X. Lan;X. Zhao
采用表面机械研磨处理（SMAT）在Zr-4表面获得了纳米结构的表面层。通过光学显微镜、硬度测试和极化曲线测试，分析了SMAT试样的组织和性能。结果表明，当处理时间为5 min时，表层平均晶粒尺寸可细化至23 nm。SMAT-ed处理15 min的平均晶粒尺寸为20 nm，最小。在1 molH 2SO 4溶液中，表面粗糙度增大，耐蚀性降低。
A nanostructured surface layer was obtained on the surface of Zr-4 by surface mechanical attrition treatment(SMAT). The structure and the properties of the SMAT sample were analyzed by means of the optical microscope, hardness and polarization curve testing. The results show that， when processing time for 5min, the average grain sizes on the surface layer can be refined to 23nm. The average grain size by SMAT-ed for 15min is 20nm, which is the smallest. The microhardness have a significant increase, the surface roughness also increase, and the corrosion resistance reduce in 1mol H2SO4 solution.