喷丸处理Zr-4合金氧化膜组织和氧化动力学研究

Study on Organization and Oxidation Kinetics of Zr-4 Alloy Oxide Film Treated by Shot Peening

采用高能喷丸技术获得表面处理的Zr-4合金,并对其在673K,18.3MPa的高压釜中腐蚀,通过XRD、SEM、AFM分析喷丸处理后Zr-4合金形成的氧化膜与普通Zr-4合金形成的氧化膜的成分、形貌、表面粗糙度、晶粒尺寸大小及应力分布等。发现喷丸处理后的Zr-4合金晶粒尺寸减小,并改善了锆合金的耐腐蚀性能。

The resistance corrosion of zircaloy-4 by a shot peening treatment in autoclave steam at 673 K has been discussed with the oxide film component, topography, surface roughness, grain size and stress distribution according to XRD, SEM, AFM in this paper. It is found that the grain size decreases and the resistance corrosion is improved after the shot peening treatment for the zircaloy-4 alloy.