University of Oulu

Xiong, Y., Shu, K., Li, Y., Chen, Z., Zha, X., He, T., & Wang, S. (2023). Excellent strength-ductility synergy in a ultra-high strength Ni-W-Co-Ta medium-heavy alloy by orthogonal rolling. Journal of Materials Processing Technology, 316, 117968.

Excellent strength-ductility synergy in a ultra-high strength Ni-W-Co-Ta medium-heavy alloy by orthogonal rolling

Saved in:
Author: Xiong, Yi1,2; Shu, Kang-hao1; Li, Yong3;
Organizations: 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2Provincial and Ministerial Co-construction of Collaborative lnnovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, Henan, China
3Central Iron and Steel Research Institute, Beijing 100081, China
4State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China
5Luoyang Ship Material Research Institute, Luoyang 471000, Henan, China
6Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Elsevier, 2023
Publish Date: 2025-04-04


Medium heavy alloy (MHA) with intermediate (50–75 wt%) W contents has been considered to be a promising alternative to costly tungsten (≥ 90 wt%) heavy alloy. However, superior mechanical property is always a necessity to compensate for the reduced W. Herein, a thermomechanical processing approach, including casting, solid solution treatment and plastic deformation procedures proposed to prepare high strength Ni-W-Co-Ta MHA efficiently. Specifically, the critical plastic deformation method is orthogonal rolling where the rolled alloy was rotated by 90° about the rolling direction in order to mitigate the anisotropic drawbacks by conventional unidirectional and cross rolling. The influence of processing parameters, such as rolling method and accumulated strain, on the microstructure evolution and mechanical property characteristics were explored. It was found that Ni-W-Co-Ta MHA prepared by orthogonal rolling exhibited 100 MPa greater enhancement in strengths than that by unidirectional rolled one. Surprisingly, the elongation at tensile failure achieved 13.8%, much higher than unidirectional rolled of elongation (8.7%). This excellent combination of strength and ductility was found to be due to the relatively homogeneous deformed microstructure by orthogonal rolling other than the typical fiber microstructure by unidirectional rolling. Without extra capital investment in infrastructures, it is believed that this rolling processing procedures can also be used for other alloys.

see all

Series: Journal of materials processing technology
ISSN: 0924-0136
ISSN-E: 1873-4774
ISSN-L: 0924-0136
Volume: 316
Article number: 117968
DOI: 10.1016/j.jmatprotec.2023.117968
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This work was supported by the National Natural Science Foundation of China [grant numbers U1804146, 51905153, and 52111530068]; the Science and Technology Innovation Team of Henan University of Science and Technology [grant number 2015XTD006] and Major science and technology projects of Henan Province [grant number 221100230200].
Copyright information: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http:/