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Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G
Gong, Li; Chen, Bo; Yang, Yaqian; Du, Zhanhui; Liu, Kui; Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2017-07-31
发表期刊ELSEVIER SCIENCE SA
ISSN0921-5093
卷号701页码:111-119
摘要This study investigates the effects of nitrogen (N) content (0.0005-0.0045 wt%) on the microsegregation, microstructures and high temperature mechanical properties of cast superalloy K417G. The results show that the segregation of Ti to interdendritic region becomes very serious with increased N content. In all three samples with different N contents, the alloys are typically dendritic morphology and gamma' phases show good cubic structure. With the N content increasing from 0.0005 wt% to 0.0045 wt%, the volume fraction of gamma' phase in the dendrite decreases, the sizes of gamma/gamma' eutectic and MC carbide increase, and the volume fractions of gamma/gamma' eutectic, MC carbide and micro-porosity firstly increase but then decrease. N addition changes the morphology of MC carbide from script-like shape to blocky shape, and Ti(C, N) is identified in the alloy with 0.0045 wt% N. With the N content increasing, the ultimate and yield strength decrease at elevated temperature, and the ductile and stress rupture life firstly have a sharp decrease and then have a slight increase. The specimen with the minimal content of N shows the best comprehensive mechanical properties.; This study investigates the effects of nitrogen (N) content (0.0005-0.0045 wt%) on the microsegregation, microstructures and high temperature mechanical properties of cast superalloy K417G. The results show that the segregation of Ti to interdendritic region becomes very serious with increased N content. In all three samples with different N contents, the alloys are typically dendritic morphology and gamma' phases show good cubic structure. With the N content increasing from 0.0005 wt% to 0.0045 wt%, the volume fraction of gamma' phase in the dendrite decreases, the sizes of gamma/gamma' eutectic and MC carbide increase, and the volume fractions of gamma/gamma' eutectic, MC carbide and micro-porosity firstly increase but then decrease. N addition changes the morphology of MC carbide from script-like shape to blocky shape, and Ti(C, N) is identified in the alloy with 0.0045 wt% N. With the N content increasing, the ultimate and yield strength decrease at elevated temperature, and the ductile and stress rupture life firstly have a sharp decrease and then have a slight increase. The specimen with the minimal content of N shows the best comprehensive mechanical properties.
部门归属[gong, li ; chen, bo ; yang, yaqian ; du, zhanhui ; liu, kui] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
关键词K417g Cast Superalloy Nitrogen Content Microsegregation Microstructure Mechanical Property
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79172
专题中国科学院金属研究所
通讯作者Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Gong, Li,Chen, Bo,Yang, Yaqian,et al. Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G[J]. ELSEVIER SCIENCE SA,2017,701:111-119.
APA Gong, Li,Chen, Bo,Yang, Yaqian,Du, Zhanhui,Liu, Kui,&Chen, B .(2017).Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G.ELSEVIER SCIENCE SA,701,111-119.
MLA Gong, Li,et al."Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G".ELSEVIER SCIENCE SA 701(2017):111-119.
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