Transactions of Materials and Heat Treatment

Title：Influence of hot forming parameters on microstructure and tensile properties of alloy TC25 forging β

Authors： Zhang Xiaoyuan Ma Chi Shi Xiaoyun Wang Xiaoliang Du Yuxuan Li Shaoqiang Lei Jinwen Du Jianchao

Unit： Western Superconducting Technologies Co. Ltd. AVIC Commercial Aircraft Engine Co. Ltd.

KeyWords： alloy TC25 forging β deformation parameter microstructure tensile properties

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2015,40(11):117-121

Abstract：

The microstructure evolution and tensile properties of alloy TC25 were conducted at different deformation parameters in β region. The experimental results show that Widmanstaten microstructure transforms into a lamellar microstructure with the increase of deformation degree. Furthermore, with the increase of deformation temperature, the microstructure changes from three states microstructure to lamellar microstructure. Finally, it becomes α sheet bundle microstructure of consistent orientation and inhomogeneity of microstructure increases suddenly and appears intermittent or continuous α grain boundary and bulk α. The above microstructures are beneficial to improve the high temperature tensile strength of the alloy forging. In order to obtain a better alloy forging of high temperature tensile strength, there are two optional ranges for the deformation parameters, one is deformation temperature around Tβ+15 ℃ with the deformation degree within 35%-50%, the other is the deformation temperature around Tβ+35 ℃ with the deformation degree within 45%-60%.

Funds：

国家国际科技合作专项（2013DFR50090）；陕西省科技统筹创新工程计划项目（2013KTLM-01）

张晓园（1984-），男，硕士，工程师

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