Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR

Ainaz Agh; Alireza Amini

doi:10.1007/s12613-018-1654-z

Volume 25 Issue 9

Sep. 2018

Turn off MathJax

数据统计

计量

文章访问数: 575
HTML全文浏览量: 89
PDF下载量: 18
被引次数: 0

文章导航 > 矿物冶金与材料学报（英文） > 2018 > 25(9): 1035-1041

Ainaz Aghand Alireza Amini, Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR, Int. J. Miner. Metall. Mater., 25(2018), No. 9, pp. 1035-1041. https://doi.org/10.1007/s12613-018-1654-z

Cite this article as:

Ainaz Aghand Alireza Amini, Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR, Int. J. Miner. Metall. Mater., 25(2018), No. 9, pp. 1035-1041. https://doi.org/10.1007/s12613-018-1654-z

Citation:

PDF( 553 KB)

引用本文 PDF XML SpringerLink

研究论文

Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR

Department of Materials Engineering, Islamic Azad University Karaj Branch, Karaj 3148635731, Iran

通讯作者:
Ainaz Agh E-mail: ainazwhite@gmail.com

中文摘要

The effects of vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes on the microstructure and stress rupture properties of Ni-based GTD-111 superalloy were investigated. Samples of GTD-111 master alloy were melted in VIM and VAR furnaces and then poured into a preheated ceramic mold for VIM melt or into a water-cooled copper mold for VAR melt. The as-cast samples were examined radiographically to ensure that no casting defects were present in the final castings; the samples were then heat-treated using a standard heat-treatment cycle. The microstructure of the samples was investigated using optical microscopy and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy for microanalysis. On the basis of standard ASTM-E139, stress rupture tests were carried out at 1000℃ under a stress of 300 MPa. The results showed that a γ matrix, fine γ' precipitates, a γ-γ' eutectic structure, carbide particles, and some harmful phases such as σ and η phases were present in the as-cast samples. The γ' precipitates with cubic morphology appeared in the matrix after the standard heat-treatment process. The extent of segregation and the amount of γ-γ' eutectic structure formed in the VAR-prepared sample were less than in the VIM-prepared sample. The results of stress rupture tests showed that the rupture time for the VAR sample was 43% longer than that for the VIM sample.

关键词:

Research Article

Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR

Ainaz Agh and
Alireza Amini

+ Author Affiliations

Abstract

Abstract

The effects of vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes on the microstructure and stress rupture properties of Ni-based GTD-111 superalloy were investigated. Samples of GTD-111 master alloy were melted in VIM and VAR furnaces and then poured into a preheated ceramic mold for VIM melt or into a water-cooled copper mold for VAR melt. The as-cast samples were examined radiographically to ensure that no casting defects were present in the final castings; the samples were then heat-treated using a standard heat-treatment cycle. The microstructure of the samples was investigated using optical microscopy and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy for microanalysis. On the basis of standard ASTM-E139, stress rupture tests were carried out at 1000℃ under a stress of 300 MPa. The results showed that a γ matrix, fine γ' precipitates, a γ-γ' eutectic structure, carbide particles, and some harmful phases such as σ and η phases were present in the as-cast samples. The γ' precipitates with cubic morphology appeared in the matrix after the standard heat-treatment process. The extent of segregation and the amount of γ-γ' eutectic structure formed in the VAR-prepared sample were less than in the VIM-prepared sample. The results of stress rupture tests showed that the rupture time for the VAR sample was 43% longer than that for the VIM sample.
- GTD-111;
- vacuum induction melting (VIM);
- vacuum arc remelting (VAR);
- stress rupture

FullText(HTML)

Supplements(0)

References(17)

References

[1]	S.A. Sajjadi, S. Nategh, and R.I.L. Guthrie, Study of microstructure and mechanical properties of high performance Ni-base superalloy GTD-111, Mater. Sci. Eng. A, 325(2002), No. 1-2, p. 484.
[2]	B.G. Choi, I.S. Kim, D.H. Kim, and C.Y. Jo, Temperature dependence of MC decomposition behavior in Ni-base superalloy GTD 111, Mater. Sci. Eng. A, 478(2008), No. 1-2, p. 329.
[3]	H.I. Kim, H.S. Park, J.M. Koo, C.S. Seok, S.H. Yang, and M. Y. Kim, Microstructural investigation of GTD 111DS materials in the heat treatment conditions, J. Mech. Sci. Technol., 26(2012). No. 7, p. 2019.
[4]	S.A. Sajjadi, S.M. Zebarjad, R.I. L. Guthrie, and M. Isac, Microstructure evolution of high-performance Ni-base superalloy GTD-111 with heat treatment parameters, J. Mater. Process. Technol., 175(2006), No. 1-3, p. 376.
[5]	C.X. Yang, Y.L. Xu, Z.X. Zhang, H. Nie, X.S. Xiao, G.Q. Jia, and Z. Shen, Improvement of stress-rupture life of GTD-111 by second solution heat treatment, Mater. Des., 45(2013), p. 308.
[6]	S.A. Sajjadi and S. Nategh, A high temperature deformation mechanism map for the high performance Ni-base superalloy GTD-111, Mater. Sci. Eng. A, 307(2001), No. 1-2, p. 158.
[7]	S. Sathian, Metallurgical and Mechanical Properties of Ni-Based Superalloy Friction Welds[Dissertation], University of Toronto, Toronto, 1999.
[8]	S.A. Sajjadi, S. Nategh, M. Isac, and S.M. Zebarjad, Tensile deformation mechanisms at different temperatures in the Ni-base superalloy GTD-111, J. Mater. Process. Technol., 155(2004), p. 1900.
[9]	S. Nategh and S.A. Sajjadi, Dislocation network formation during creep in Ni-base superalloy GTD-111, Mater. Sci. Eng. A, 339(2003), No. 1-2, p. 103.
[10]	J.J. Yu, X.F. Sun, T. Jin, N.R. Zhao, H.R. Guan, and Z.Q. Hu, High temperature creep and low cycle fatigue of a nickel-base superalloy, Mater. Sci. Eng. A, 527(2010), No. 9, p. 2379.
[11]	ASTM, E139-11, Standard Test Method for Conducting Creep, Creep-Rupture and Stress-Rupture Tests of Metallic Materials, American Society for Testing and Materials, Philadelphia, 2011.
[12]	J. Ding, S. Jiang, Y.M. Li, Y.T. Wu, J. Wu, Y.Y. Peng, X. He, X.C. Xia, C. Li, and Y.C. Liu, Microstructure evolution behavior of Ni₃Al (γ') phase in eutectic γ-γ' of Ni₃Al-based alloy, Intermetallics, 98(2018), p. 28.
[13]	R. Kakitani, R.V. Reyes, A. Garcia, J.E. Spinelli, and N. Cheung, Relationship between spacing of eutectic colonies and tensile properties of transient directionally solidified Al-Ni eutectic alloy, J. Alloys Compd., 733(2018), p. 59.
[14]	W.F. Smith, Structure and Properties of Engineering Alloys, McGraw-Hill, New York, 1987.
[15]	J.L. Liu, T. Jin, J.J. Yu, X.F. Sun, H.R. Guan, and Z.Q. Hu, Effect of thermal exposure on stress rupture properties of a Re bearing Ni base single crystal superalloy, Mater. Sci. Eng. A, 527(2010), No. 4-5, p. 890.
[16]	G.S. Ansell and J.W. Weertman, Creep of Dispersion-Hardened Aluminum Alloy, Naval Research Lab., Washington DC, 1958.
[17]	H.J. Chang, M.C. Fivel, and J.L. Strudel, Micromechanics of primary creep in Ni base superalloys. Int. J. Plast., 108(2018), p. 21.

Relative Articles

Cited By

Proportional views

数据统计

姓名
邮箱
手机号码
标题
留言内容
验证码

留言板

数据统计

分享

计量

Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR

中文摘要

Investigation of the stress rupture behavior of GTD-111 superalloy melted by VIM/VAR

Abstract

References

数据统计

Catalog