Microstructure Formation Mechanism and Properties of a Mg-3Sn-1Mn (wt%) Magnesium Alloy Processed by a Novel Semisolid Continuous Shearing and Rolling Process

다국어 초록 (Multilingual Abstract)

A novel semisolid Continuous Shearing and Rolling (CSR) process for producing a Mg-3Sn-1Mn (wt%)alloy strip is developed, and the microstructure formation mechanism and properties of the Mg-3Sn-1Mn (wt%) alloy processed by this process are investigated. At a casting temperature of 690°C and a roll speed of 0.052 m·s.1, a Mg-3Sn-1Mn (wt%) alloy strip with a cross section size of 4×160 mm was produced by the proposed process. Under strong cooling and shearing actions, eruptive nucleation, direct globular grain growth and dendrite arm breakage took place during the process, which caused formations of fine spherical grains. The grain size and roundness of the Mg-3Sn-1Mn (wt%) alloy strip increased with increasing increments of the casting temperature. In this perspective, roll speed obviously affects grain shape. The ultimate tensile strength and elongation of the Mg-3Sn-1Mn (wt%) alloy strip reached 205.93 MPa and 7.2%.

참고문헌 (Reference)

1 M. Kiuchi, 35 : 790-, 1995

2 R. G. Guan, 22 : 706-, 2006

3 C. L. Martin, 202 : 111-, 1995

4 R. G. Guan, 25 : 395-, 2009

5 T. Rzycho ´n, 53 : 901-, 2008

6 J. Adamiec, 56 : 117-, 2011

7 X. L. Zhang, 56 : 1048-, 2007

8 Y. Chino, 473 : 195-, 2008

9 B. Kondori, 40 : 2007-, 2009

10 M. B. Yang, 21 : 2168-, 2011

11 R. B. Song, 198 : 291-, 2008

12 F. S. Pana, 528 : 4973-, 2011

13 S. C. Wang, 22 : 195-, 2006

14 D. Brabazon, 326 : 370-, 2002

15 M. A. Jaworski, 104 : 1-, 2010

16 R. Haghayeghia, 502 : 382-, 2010

17 S. Thanabumrungkul, 3 : 1016-, 2010

18 Do H. Kim, "High Temperature Deformation Behavior of Mg-Sn(-Zn) Alloy" 대한금속·재료학회 17 (17): 383-388, 2011

19 S. M. Yang, "Heat Transfer" Higher Education Press 4-224, 2006

20 Young Min Kim, "Effect of the Ca Content on the Microstructural Evolution of Ca Containing AZ31 Cast Alloys" 대한금속·재료학회 17 (17): 583-586, 2011

21 H. L. Kim, "Deformation Mechanism Temperature-Dependence of AZ31 Magnesium Alloy" 대한금속·재료학회 17 (17): 563-568, 2011