Precipitation of γ′ phases during slow cooling of nickel based superalloy

被引：3

作者：

Liu, Y. ^{[1
]}

Li, S. ^{[1
]}

Pei, Y. ^{[1
]}

Zhang, H. ^{[1
]}

Gong, S. ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷

关键词：

Nickel based superalloy; Slow cooling process; Precipitation; gamma ' phases; GENERATIONS;

D O I：

10.1179/1432891714Z.000000000708

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the precipitation behaviour of gamma' phases during cooling after solution treatment has been investigated. An experimental superalloy with a large gamma' volume fraction was employed, and the average cooling rate was ca. 5 degrees C min(-1). In order to investigate the forming of precipitates at different temperature stages, interrupt quenching was used during the cooling process. As the results show, the gamma' precipitates change from monomodal to multimodal size distributions with quenching temperature. On the one hand, the large gamma' phases were mainly formed by coalescing and merging. On the other hand, small gamma' in the matrix were continuously precipitated during the cooling process, and the nucleation was not shut off until quenching at 1100 degrees C. The precipitation mechanism is also discussed in this paper.

引用

页码：390 / 394

页数：5

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