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Metals 2016, 6(1), 1; doi:10.3390/met6010001

Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

1
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2
State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Johan Moverare
Received: 31 October 2015 / Revised: 14 December 2015 / Accepted: 15 December 2015 / Published: 23 December 2015
(This article belongs to the Special Issue Superalloys)
View Full-Text   |   Download PDF [3451 KB, uploaded 23 December 2015]   |  

Abstract

The mechanical properties of GH4169 alloy sheet after cold rolling (at 0%, 10%, 30%, 50% and 70%) and solid solution were investigated. The textures and Taylor factors were characterized using electron backscattering diffraction (EBSD). The fractions of δ phase were measured by X-ray diffraction. The contributions of δ phase, grain size, texture, and work hardening on the mechanical properties were also discussed. The results showed increases in the yield strength (YS) (0.2%) as well as the ultimate tensile strength (UTS) of GH4169 superalloy sheet after cold rolling, when rolling reduction was increased. In contrast, following solid solution treatment, YS and UTS were increased then subsequently decreased. The changes of yield strength of GH4169 superalloy were attributed to the texture and work hardening, followed by the grain refinement and precipitation of δ phase. When the rolling reduction was below 30%, the influence of δ phase was greater than grain refinement and when the rolling reduction was larger than 50%, the controversial results occur. The precipitation of δ phase promoted the improvement of yield strength, the relationship between the fraction of δ phase and improved yield strength satisfactory fit to the following equation: σδ = 15.9Wδ + 59.7. View Full-Text
Keywords: GH4169 alloy; cold rolling; mechanical property; phase fraction; heat treatment GH4169 alloy; cold rolling; mechanical property; phase fraction; heat treatment
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Zhang, S.-H.; Ye, N.-Y.; Cheng, M.; Song, H.-W.; Zhou, H.-W.; Wang, P.-B. Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature. Metals 2016, 6, 1.

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