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

Metals

Shi-Hong Zhang¹  Neng-Yong Ye¹  Ming Cheng¹  Hong-Wu Song¹  Hong-Wei Zhou²  Ping-Bo Wang² 

[1] Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;

关键词: GH4169 alloy;    cold rolling;    mechanical property;    phase fraction;    heat treatment;   

DOI  :  10.3390/met6010001

来源: mdpi

【 摘 要 】

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: σ_δ = 15.9W_δ + 59.7.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.