SHANDONG SCIENCE ›› 2016, Vol. 29 ›› Issue (5): 65-69.doi: 10.3976/j.issn.1002-4026.2016.05.011

• New Materials • Previous Articles     Next Articles

Impact of Sr content on microstructure and mechanical properties of A356 alloy

ZHAO Houliang1, ZHOU Jixue2,3, TANG Shouqiu4, WANG Jinwei2,ZHANG Linlin4, CHEN Yanfei2,3, LI Changlong1, WU Jianhua2,3*   

  1. 1. Shandong Jianzhu University, Jinan 250101,China ;2. Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials (in preparation),Advanced Materials Institute,Shandong Academy of Sciences, Jinan 250014, China; 3. Shandong Engineering Research Center of Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute,Shandong Academy of Sciences,Jinan 250014, China; 4.  Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China
  • Received:2016-04-18 Online:2016-10-20 Published:2016-10-20

Abstract:

We analyzed the impact of Sr content on microstructure and mechanical properties of A356 alloy through Al10Sr master alloy addition. Results show that mechanical properties of A356 alloy first increase and then decrease with the increase of Sr content. It has tensile strength of 204 MPa and elongation rate of 10.4% for Sr content of 0.03%. The two parameters are improved by 18% and 189%, as compared with unmodified A356 alloy. Microstructure analysis indicates that Sr addition can significantly change the morphology of eutectic silicon, from coarse plate form to fine fibrous or particle form, so its mechanical properties are improved.

Key words: Sr content, mechanical properties, A356 alloy, microstructure

CLC Number: 

  • TG146.21