冷却速率对MgZnCa合金显微组织、力学性能及腐蚀性能的影响(英文期刊).pdf

Trans. Nonferrous Met. Soc. China 23(2013) 19301935Effects of cooling rate on microstructure, mechanical andcorrosion properties of MgZnCa alloyJing-feng WANG1,2, Song HUANG1,2, Sheng-feng GUO3, Yi-yun WEI1,2, Fu-sheng PAN1 1. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China;2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;3. School of Materials Science and Engineering, Southwest University, Chongqing 400715, ChinaReceived 26 March 2012; accepted 30 May 2013Abstract: Mg69Zn27Ca4 alloys with diameters of , 2 and 3 mm were fabricated using copper mold injection casting analysis reveals that the alloy with a diameter of mm is posed of amorphous , with the cooling rate decline, a little α-Mg and MgZn dendrites can be found in the amorphous matrix. Based on themicrostructural and tensile results, the ductile dendrites are conceived to be highly responsible for the pressive strainfrom % to % by increasing the sample diameter from mm to 3 mm. In addition, the Mg69Zn27Ca4 alloy with mmdiameter has the best corrosion properties. The current Mg-based alloys show much better corrosion resistance than the mercial wrought magnesium alloy ZK60 in simulated sea- words: MgZnCa alloy; bulk metallic glasses; cooling rate; mechanic