DEVELOPMENT OF HIGH STRENGTH Mg-Cu-Zn ULTRAFINE EUTECTIC COMPOSITES WITH ENHANCED PLASTICITY

作者：Song Ki An^*; Kim Ki Buem; Park Jin Man; Lee Jae Seol; Park Joon Sik; Lee Won Hee; Kim Do Hyang

来源：International Journal of Modern Physics B, 2009, 23(6-7): 947-952.

DOI：10.1142/s0217979209060282

• Composites
• ternary alloy systems
• alloy design
• casting
• microstructure

Mg-Cu-Zn ultrafine eutectic composites with different length scale heterogeneity, consisting of micrometer size dendrites and/or ultrafine scale bimodal eutectics, exhibit high yield strength as well as good plasticity at room temperature compression. Among these alloys, micron-scale alpha-Mg dendrites reinforced ultrafine eutectic composites exhibit high yield strength of 310 similar to 420 MPa and large plasticity of 7 similar to 12%. Meanwhile, a Mg(72)Cu(5)Zn(23) alloy comprising a bimodal eutectic structure without the micron-scale alpha-Mg dendrites shows the optimized mechanical properties the highest yield strength of 455 MPa combined with a considerable plastic strain of similar to 5%.

• 出版日期2009-3-20