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THE MULTI-LAYER LASER CLADDING OF Ni60 ALLOY 被引量:3
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作者 Y.M.Li,W.D.Huang,L.P.Feng and J.Chen State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1999年第5期1025-1028,共4页
The Multi layer coating of Ni60 alloy was got by multi layer laser cladding. The height of the coating was about 12mm and the wall of the coating was perpendicular to the base. The microstructure of the coating was ... The Multi layer coating of Ni60 alloy was got by multi layer laser cladding. The height of the coating was about 12mm and the wall of the coating was perpendicular to the base. The microstructure of the coating was made up of fine dendrite. The conjunction between layers was good. 展开更多
关键词 laser near net shaping multi layer laser cladding ni60 alloy
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Microstructure and high temperature tribological behavior of laser cladding Ni60A alloys coatings on 45 steel substrate 被引量:21
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作者 张健 胡玉 +2 位作者 谭小军 郭亮 张庆茂 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第5期1525-1532,共8页
The crack-free Ni60 A coating was fabricated on 45 steel substrate by laser cladding and the microstructure including solidification characteristics, phases constitution and phase distribution was systematically inves... The crack-free Ni60 A coating was fabricated on 45 steel substrate by laser cladding and the microstructure including solidification characteristics, phases constitution and phase distribution was systematically investigated. The high temperature friction and wear behavior of the cladding coating and substrate sliding against GCr15 ball under different loads was systematically evaluated. It was found that the coating has homogenous and fine microstructure consisting of γ(Ni) solid solution, a considerable amount of network Ni-Ni3 B eutectics, m^23C6 with the floret-shape structure and Cr B with the dark spot-shape structure uniformly distributing in interdendritic eutectics. The microhardness of the coating is about 2.6 times as much as that of the substrate. The coating produces higher friction values than the substrate under the same load condition, but the friction process on the coating keeps relatively stable. Wear rates of the coating are about 1/6.2 of that of the substrate under the higher load(300 g). Wear mechanism of the substrate includes adhesion wear, abrasive wear, severe plastic deformation and oxidation wear, while that of the coating is merely a combination of mild abrasive wear and moderate oxidation wear. 展开更多
关键词 laser cladding ni60A alloy 45 steel MICROSTRUCTURE tribological behavior
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Magnetization-Enhanced Dislocation Motion and Decreased Yield Strength of 60Fe40Ni Alloy 被引量:1
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作者 Hongqi LI, Yanbin WANG and Wuyang CHU Dept. of Materials Physics & Chemistry, University of Science and Technology Beijing, Beijing 100083, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第4期457-459,共3页
Using a special constant deflection device, the changes in dislocation configuration ahead of a loaded crack tip for 60Fe40Ni alloy. before and after magnetization in a magnetic field, have been studied in TEM. The re... Using a special constant deflection device, the changes in dislocation configuration ahead of a loaded crack tip for 60Fe40Ni alloy. before and after magnetization in a magnetic field, have been studied in TEM. The results showed that the magnetization for 60Fe40Ni alloy could enhance dislocation emission, multiplication and motion. Also, the mechanical properties of 60Fe40Ni alloy, in air and in the magnetic field respectively have been investigated using the slow strain rate tension. And the results indicated that magnetization could make the yield strength corresponding to decrease by 26 percent, but did not influence the ultimate tensile strength and the fracture strain, which showed that magnetization could enhance plastic deformation. 展开更多
关键词 FE Magnetization-Enhanced Dislocation Motion and Decreased Yield Strength of 60Fe40Ni alloy NI
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