Effect of Ru on Creep Properties of a High Tungsten Containing Ni-based Single Crystal Superalloy

被引：0

作者：

Liang S. ^{[1
]}

Liu Z. ^{[1
]}

Liu L. ^{[2
]}

Liang J. ^{[1
]}

Ji L. ^{[1
]}

Shao H. ^{[1
]}

机构：

[1] School of Mechanical and Power Engineering, Yingkou Institute of Technology, Yingkou

[2] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2021年 / 35卷 / 09期

关键词：

Creep property; Element distribution determination; Metallic materials; Nickel-based single crystal superalloy; Ru; W;

D O I：

10.11901/1005.3093.2021.169

中图分类号：

学科分类号：

摘要：

The creep property of 4 nickel-based single crystal superalloys with 4% W, 6% W and 6%W+2%Ru is comparatively studied by creep testing machine, scanning electron microscope, three dimensional atom probe and X-ray diffractometer, aiming to clarify the effect of Ru on the creep performance of the alloy. The results show that the increase in W content will impair the creep performance of the alloy, the creep life of the alloy with 6%W decreases to 58 h at 1070℃/137 MPa. The alloying with Ru can promote the distribution of element W in γ/γ phase more reasonably, whilst inhibit the diffusion of element W from γ phase to γ phase during high temperature creep testing. Therefore, the alloy with 6%W+2%Ru presents a high creep life of 383 h at 1070℃/137 MPa, while no TCP precipitate in the alloy may be observed after high temperature creep testing. During the high temperature creep of the three alloys, the γ phase can form perpendicular to the direction of stress axis, and the TCP phase can destroy the continuity of the raft-like structure, resulting in the increase of the kinking degree of γ/γ phases, which is the main reason for the low creep life of the Ru-free 6%W alloy. © 2021, Editorial Office of Chinese Journal of Materials Research. All right reserved.

引用

页码：694 / 702

页数：8

共 20 条

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