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题名: Segregation of Phosphorus and Precipitation of MNP-Type Phosphide at the Grain Boundary of IN706 Superalloy
作者: Zhang, Sha;  Huang, Linjie;  Zhang, Anwen;  Yu, Lianxu;  Xin, Xin;  Sun, Wenru;  Sun, Xiaofeng
发表日期: 2017-2-1
摘要: The effect of phosphorus content and heat treatment on the segregation of phosphorus and precipitation of phosphide at the grain boundary of IN706 alloy has been investigated. The phosphide had a stoichiometry of MNP (M = Nb, Ti and N = Ni, Fe, Cr) and an orthorhombic crystal structure. The solubility of phosphorus in the grain matrix of IN706 alloy was determined to be between 0.008% and 0.013%. When soaked at 980 degrees C for 5 min, the phosphide was noticeably precipitated at grain boundaries with the grain size unchanged. When soaked at 980 degrees C for 3 h, the grains grew significantly, but the phosphide stayed at original grain boundaries which outlined the grain shape before soaking. Soaking at 1060 degrees C for 2 h fully dissolved the pre-existing phosphide but phosphorus atoms were not distributed uniformly in the grain matrix. When the holding time at 1060 degrees C was extended to 10 h, the phosphorus atoms were distributed uniformly in the grain matrix by sufficient diffusion, and the phosphide could only be formed at grain boundaries during the 980 degrees C soaking. The precipitation of phosphide mainly relied on the phosphorus segregation which was built up by diffusion. Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Zhang, Sha,Huang, Linjie,Zhang, Anwen,et al. Segregation Of Phosphorus And Precipitation Of Mnp-type Phosphide At The Grain Boundary Of In706 Superalloy[J]. Journal Of Materials Science & Technology,2017,33(2):187-191.

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