Microstructure and properties of β-NiAl and its eutectic alloy with Cr and Mo additions

张志刚; 刘先斌; 宫声凯; 徐惠彬

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Microstructure and properties of β-NiAl and its eutectic alloy with Cr and Mo additions

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＜正＞NiAl-0.3Ru and NiAl-30Cr-4Mo alloys were fabricated by arc melting method and then annealed at 1 423 K for 12 h. It has been revealed that NiAl-0.3Ru was in a single-phase with large grain size and NiAl-30Cr-4Mo consisted of multiple eutectic cells. Each cell consisted of alternating plates NiAl and Cr（Mo）. The compressive properties including the brittle-ductile transition temperature （BDTT） were tested. NiAl-0.3Ru and NiAl-30Cr-4Mo fractured with a little plastic deformation after yielding below the BDTT, and almost no fracture was found after large deformation up to 60% above the BDTT. Fractograph showed that at the room temperature, the fracture in NiAl-0.3Ru was intergranular and the NiAl-30Cr-4Mo in transgranular along the interface betweenβ-NiAl and Cr （Mo）. The compressive properties of NiAl were obviously improved by eutectic alloying with Mo and Cr additions.

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《中国有色金属学报：英文版》 |2006年第s3期|2046-2049|共4页
作者
张志刚; 刘先斌; 宫声凯; 徐惠彬;
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作者单位

School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics;

Beijing 100083;

China;

School of Materials Science and Engineering;

Beijing University of Aeronautics and Astronautics;

Beijing 100083;

China;

School of Materials Sci;

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正文语种 chi
中图分类金相学（金属的组织与性能）;
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机译：β-铝化镍;低共熔合金;压缩性能;脆性;延展性;断裂形态;

Microstructure and properties of β-NiAl and its eutectic alloy with Cr and Mo additions

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