LI Hui Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
ChinaLIU Xiang Northeast Institute of Technology
,
Shenyang
,
ChinaGUO Jianting HU Zhuangqi Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China Associate Professor
,
Institute of Metall Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
By means of nonstoichiometry,rapid solidification and adequate boron addition,the tensile strength and bending resistance of Ni_3Al has been improved.When adding 0.52 to 1.37 at.-% B into Ni_3Al,which has the beneficial effect on the ductility.If boron addition is too high, there are coarse Ni_(23)B_6 particles and NiB_(12) phases found at the grain boundaries.Boron modification in Ni_3Al promotes the ordering in the region near grain boundaries.The grain boundary of boron free Ni_3Al is a large angle one,but turns into a small angle grain bound- ary with sub-grains of dislocation characteristics when the boron content in Ni_3Al reaches 1.37 at.-%.
关键词:
intermetallic compound
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