Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of IN738LC Superalloy

Qun Gong He; Jun Liu; Lin Xu Li; Zhen Huan Gao; Xiao Yan Shi; Gong Xian Yang

doi:10.4028/www.scientific.net/MSF.898.401

Paper Titles

Evolution of LPSO Structure of Mg-11Gd-4Y-2Zn-0.5Zr Alloy during Hot Compression Deformation at Different Temperatures
p.372

Effect of Heat Treatment on Microstructure Evolution and Mechanical Behavior of SKLB3 Alloy
p.380

Constitutive Equations for 6061 Aluminum Alloy at Elevated Temperature
p.387

Dielectric Characteristics of (Ca_0.2Sr_0.8)₃(Zr_xTi_1-x)₂O₇ Ceramics at Microwave Frequencies
p.392

Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of IN738LC Superalloy
p.401

Effect of a High Magnetic Field on the Microstructure of Directionally Solidified NiAl-Cr(Mo)-Si Near-Eutectic Alloy at Different Withdrawal Rates
p.407

Microstructures of Low Angle Boundaries of a Third Generation Single Crystal Superalloy DD9
p.413

High Temperature Rupture Life of Nickel-Based Superalloy under Directional Solidification with High Temperature Gradient
p.422

Effect of Alloying Elements on Volume Fraction of γ′ Phase in Power Metallurgy Nickel-Base Superalloy
p.430

HomeMaterials Science ForumMaterials Science Forum Vol. 898Effect of Hot Isostatic Pressing on...

Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of IN738LC Superalloy

Abstract:

The microstructures and mechanical properties of IN738LC superalloy made by investment castings followed by Hot Isostatic Pressing (HIP) treatment have been investigated. The results revealed that after HIP treatment, the microporosities have been almost removed and the density rose by 0.21%. The eutectic size became smaller and the fraction decreased. The γ' phase was more regular and also increased in size, while a large number of secondary γ' phase appeared. With HIP treatment, the impact toughness increased from 5.0J ~ 7.0J to 8J ~ 9J and tensile strength at 200°C ~ 800°C was improved by approximately 3.2%~19.7%. In addition, the ductility and the stress rupture life have also been greatly improved as well.

You might also be interested in these eBooks

View Preview

View Preview

Info:

Periodical:

Materials Science Forum (Volume 898)

Pages:

401-406

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.401

Citation:

Cite this paper

Online since:

June 2017

Authors:

Qun Gong He*, Jun Liu, Lin Xu Li, Zhen Huan Gao, Xiao Yan Shi, Gong Xian Yang

Keywords:

Hot Isostatic Pressing (HIP), IN738LC, Mechanical Properties, Microporosity, Nickel-Base Superalloy

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] E. Balikci, D. Erdeniz. Multimodal precipitation in the superalloy IN738LC, Metallurgical & Materials Transactions A. 41 (2010) 1391-1398.

DOI: 10.1007/s11661-010-0241-3

Google Scholar

[2] E. Balikci, A. Raman, Characteristics of the γ' precipitates at high temperatures in Ni-base polycrystalline superalloy IN738LC, Journal of Materials Science. 35 (2000) 3593-3597.

Google Scholar

[3] C.H. Konrad, M. Brunner, K. Kyrgyzbaev, Determination of heat transfer coefficient and ceramic mold material parameters for alloy IN738LC investment castings, Journal of Materials Processing Technology. 211 (2011) 181-186.

DOI: 10.1016/j.jmatprotec.2010.08.031

Google Scholar

[4] S. Pattnaik, D.B. Karunakar, P.K. Jha, Developments in investment casting process - A review, Journal of Materials Processing Technology. 212 (2012) 2332-2348.

DOI: 10.1016/j.jmatprotec.2012.06.003

Google Scholar

[5] N.L. Loh, K.Y. Sia. An overview of hot isostatic pressing, Journal of Materials Processing Technology. 30 (1992) 45-65.

DOI: 10.1016/0924-0136(92)90038-t

Google Scholar

[6] T.K. Min, O.Y. Oh. Effect of high pressure on the solid - liquid phase change of a nickel base superalloy during hot isostatic pressing, Journal of Alloys & Compounds. 477 (2009) 224-232.

DOI: 10.1016/j.jallcom.2008.10.117

Google Scholar

[7] H. Burt, J.P. Dennison, I.C. Elliott, B. Wilshire, The effect of hot isostatic pressing on the creep and fracture behaviour of the cast superalloy Mar M002, Materials Science & Engineering. 53 (1982) 245-250.

DOI: 10.1016/0025-5416(82)90057-x

Google Scholar

[8] M.T. Kim, S.Y. Chang, J.B. Won, Effect of HIP process on the micro-structural evolution of a nickel-based superalloy, Materials Science & Engineering A. 441 (2006) 126-134.

DOI: 10.1016/j.msea.2006.09.060

Google Scholar

[9] H.Y. Bor, C. Hsu, C. N. Wei. Influence of hot isostatic pressing on the fracture transitions in the fine grain MAR-M247 superalloys, Materials Chemistry & Physics. 84 (2004) 284-290.

DOI: 10.1016/j.matchemphys.2003.08.014

Google Scholar