中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 36 No. 3 March 2026 |
（a School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;
b School of Mechano-Electronic Engineering, Jiyuan Vocational and Technical College, Jiyuan 459000, China;
c Collaborative Innovation Center of New Nonferrous Metal Materials and Advanced Processing Technology Jointly Established by the Ministry of Science and Technology, Luoyang 471023, China;
d Research Institute of Special Steels, Central Iron and Steel Research Institute Company Limited, Beijing 100081, China;
e National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Luoyang 471023, China;
f College of Career Technology, Hebei Normal University, Shijiazhuang 050024, China）
Abstract:The effect of warm rolling temperature (500-900 °C) on the microstructure and mechanical properties was investigated for a Ni-W-Co-Ta alloy to achieve excellent strength-plasticity synergy. The results showed that the alloy exhibited high-density dislocations and deformation bands when rolled below 750 °C. The nano-Ni4W phase precipitated when rolled at 700-900 °C, with the higher deformation temperature, the amount and size of precipitates increased. At 900 °C, dissolution of the precipitated Ni4W and dynamic recrystallization of the matrix occurred. Consequently, the strength and hardness firstly decreased, then increased, and decreased again as the deformation temperature increased. An excellent strength–plasticity synergy was achieved through the combined effects of precipitation strengthening and deformation twins strengthening of Ni4W: with a tensile strength of 2010 MPa, a yield strength of 1839 MPa, a microhardness of HV 587, and an elongation of 13.2% when the alloy was warm-rolled at 750 °C.
Key words: Ni-W-Co-Ta alloy; warm rolling; microstructure; mechanical properties
