Mechanical properties of nanocrystalline L12-type (Al+12.5 at.%M)3Zr (M=Cu, Mn) synthesized by mechanical alloying

被引：0
|
作者：
Lee, SH [1 ]
Moon, KI [1 ]
Lee, KS [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
来源：
Metastable, Mechanically Alloyed and Nanocrystalline Materials | 2005年 / 24-25卷
关键词：
nanocrystalline; intermetallics; fracture toughness;
D O I：
10.4028/www.scientific.net/JMNM.24-25.137
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Nanocrystalline L1(2)-type (Al + 12.5 at.% M)(3)Zr (M=Cu, Mn) alloys with gain sizes of 8 to 10 nm were prepared by MA and SPS. The micro-hardness was measured to be as high as 975.8 Hv and 983.9 Hv for Cu- and Mn- added alloys, respectively. However, their fracture toughness was below 2 MPam(1/2). The result may indicate that a grain refinement towards the nano scale dose not have a beneficial effect on improving fracture toughness in brittle intermetallics. In this study, some attempts have been made to investigate the effects of grain size on the fracture toughness and the results are presented and discussed.
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收藏
页码：137 / 140
页数：4
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