Enhanced compression ductility of stoichiometric NiAl at room temperature by Y and Cu co-addition |
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| Authors: | Xing-hao Du Chong Gao Bao-lin Wu Yu-hua Zhao Ji-jie Wang |
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| Affiliation: | 1.School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang,China |
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| Abstract: | The combined effects of (Y, Cu) on the microstructure and room-temperature mechanical properties of the NiAl intermetallic
compound under uniaxial compression stress were investigated. It is found that the co-addition of Y and Cu enlarges the difference
between the intergranular yield strength and the intragranular yield strength of NiAl grains. Hence, for the resultant NiAl-(Y,Cu)
alloy, a mechanically hierarchical structure forms. This is beneficial to improve the room-temperature mechanical response
of NiAl alloys; as a result, the resultant alloy with 0.56at% (Y, Cu) exhibits a remarkably enhanced compression plasticity
of about 11.2%. |
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