Effect of different strain rates on compression property and work-hardening behavior for the NiAl-matrix composite with 1.7 wt.% NbB2 and NbxC

Effect of different strain rates on compression property and work-hardening behavior for the NiAl-matrix composite with 1.7 wt.% NbB2 and NbxC
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效果%20%20不同%20应变%20率%20对%20压缩%20性能%20和%20加工硬化%20行为%20对于%20%20NiAl-基体%20复合%20与%201.7%20wt.%%20NbB2%20和%20NbxC

DOI:
10.1016/j.msea.2011.10.113
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发表时间:
2012-02
影响因子:
6.4
通讯作者:
Jiang, Q. C.
Jiang, Q. C.
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhao, H. L.;Qiu, F.;Jin, S. B.;Jiang, Q. C.

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研究了添加1.7wt.%的NiAl基复合材料的显微组织、压缩性能和加工硬化效应本文研究了用燃烧合成和热压技术制备NbB_2和NbxC(x=1或2)。NiAl基复合材料具有很强的应变速率敏感性。随着应变速率的降低,NbB 2-NbxC/NiAl复合材料的屈服强度降低,断裂应变和加工硬化能力(Hc)增加。在应变速率为2.0×10−5s−1时,该合金的真极限强度为1472 MPa,断裂应变为20.1%,Hc=1.41。
The microstructure, compression property and work-hardening effect of the NiAl-matrix composite with 1.7wt.% NbB2and NbxC (x=1 or 2) fabricated by the combustion synthesis and hot pressing technique have been investigated in the study. The NiAl-matrix composite has strong strain rate sensitivity. The yield strength of the NbB2–NbxC/NiAl composite decreases while the fracture strain and the work-hardening capacity (Hc) increase with decreasing strain rate. A high true ultimate strength of 1472MPa, a fracture strain of 20.1% and Hc=1.41 were obtained under the strain rate of 2.0×10−5s−1.
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