University of Oulu

Li, Y., Xiong, Y., Ma, Yf. et al. Effect of Aging Treatment on the Microstructure and Properties of a Novel Medium-Heavy NiWCoTa Alloy Subjected to Pre-deformation. J. of Materi Eng and Perform 32, 8314–8324 (2023).

Effect of aging treatment on the microstructure and properties of a novel medium-heavy NiWCoTa alloy subjected to pre-deformation

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Author: Li, Yong1; Xiong, Yi2,3; Ma, Yun-fei2;
Organizations: 1Central Iron and Steel Research Institute Co., Ltd., Beijing, 100081, China
2School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
3Collaborative Innovation Center of New Nonferrous Metal Materials and Advanced Processing Technology Jointly Established By the Ministry of Science and Technology, Luoyang, 471023, Henan, China
4Nano and Molecular Systems Research Unit, University of Oulu, N90014, Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Springer Nature, 2022
Publish Date: 2023-12-19


In this study, a new medium-heavy alloy (MHA) of 55Ni-39 W-5Co-1Ta was designed, based on the principles of face-centered cubic structures and age-strengthening. The microstructure and properties of pre-deformed MHA after aging were systematically explored by room-temperature tensile testing, scanning electron microscopy, transmission electron microscopy and x-ray diffraction. Results show that a large number of dislocations were generated in the solid solution of the MHA by pre-deformation, and the dislocation density increased significantly with deformation. The high-density dislocations interacted with each other and formed dislocation tangles, then the dislocation cells. Moreover, pre-deformation effectively promoted the precipitation of the Ni₄W phase during the subsequent aging, and the volume fraction of the Ni₄W phase increased significantly under increased pre-deformation. Thanks to a combined effect of work-hardening and age-strengthening, the tensile and yield strengths of the pre-deformed MHA after the aging treatment increased significantly. The fracture morphology of the pre-deformed MHA after the aging treatment showed typical ductile fracture characteristics. The novel MHA has better dynamic performance, and the flow stress of the MHA was effectively improved by the aging treatment.

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Series: Journal of materials engineering and performance
ISSN: 1059-9495
ISSN-E: 1544-1024
ISSN-L: 1059-9495
Volume: 32
Pages: 8314 - 8324
DOI: 10.1007/s11665-022-07729-w
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 and 52111530068]; the program for science, Technology Innovation Talents in Universities of Henan Province [Grant Number 17HASTIT026]; the Science and Technology Innovation Team of Henan University of Science and Technology [Grant Number 2015XTD006]; the Foreign Experts Introduction Project of Henan Province [Grant Number HNGD2020009].
Copyright information: © ASM International. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: