(1. 上海交通大學(xué) 材料科學(xué)與工程學(xué)院 輕合金精密成型國家工程研究中心，上海200240；
2. 上海交通大學(xué) 材料科學(xué)與工程學(xué)院 金屬基復(fù)合材料國家研究中心，上海200240；
3. Lehrstuhl Metallkunde und Werkstofftechnik, BTU-Cottbus, Postfach 101344, D-03013 Cottbus, Germany)
摘 要: 研究高強度變形鎂合金ZK60經(jīng)噴丸處理后的表面變形層微觀組織結(jié)構(gòu)的變化及其對高周疲勞性能的影響。結(jié)果表明：ZK60鎂合金的最佳噴丸強度(N試片)為0.05 mm，經(jīng)噴丸強化后，ZK60鎂合金表面變形層的微觀組織和織構(gòu)發(fā)生變化，疲勞強度由140 MPa提高到180 MPa，提高約29%，疲勞壽命得到顯著提高；ZK60鎂合金也表現(xiàn)出明顯的過噴效應(yīng)。
關(guān)鍵字: ZK60鎂合金；噴丸；疲勞性能
ZK60 magnesium alloy
（1. National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering,
Shanghai Jiao Tong University, Shanghai 200240, China;
2. Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering,
Shanghai Jiao Tong University, Shanghai 200240, China;
3. Lehrstuhl Metallkunde und Werkstofftechnik, BTU-Cottbus, Postfach 101344, D-03013 Cottbus, Germany）
Abstract:The influence of shot peening on the microstructure of surface layer and high cycle fatigue properties of high-strength wrought ZK60 magnesium alloy was studied. The results show that shot peening effectively improve the fatigue properties. Both the surface microstructure and texture of ZK60 magnesium alloy change greatly after shot peening. The fatigue limit increases from 140 to 180 MPa after shot peening with the optimum Almen intensity of 0.05 mm, the improvement of 29% in fatigue limit is achieved, and the fatigue life is significantly increased. In addition, the magnesium alloy ZK60 shows an obvious overpeening effect.
Key words: ZK60 magnesium alloy; shot peening; fatigue properties
