Work

Amorphous/crystalline Zn 60 Zr 40 alloys lattice structures with improved mechanical properties fabricated by mechanical alloying and selective laser melting

Year: 2023

Type: article

Abstract: In the present study, mechanical alloying (MA) was employed for synthesising non-equilibrium Zn60Zr40 amorphous powders, and then consolidated into amorphous/crystalline Zn60Zr40 alloys using selective laser melting (SLM).The results showed that the MA process destabilised the atomic periodicity of Zn and Zr powders and induced crystalline-to-amorphous transformation due to atomic size mismatch and negative heat of mixing.Moreover, the amorphisation trend of as-milled powders was intensified with increasing milling time and attained almost fully amorphous structure after 30 h of milling.During SLM, the ultra-high cooling rate restricted the long-range atomic diffusion of the amorphous powders and enabled successful survival of amorphous phase, leading to amorphous/crystalline Zn60Zr40 alloys.The alloys exhibited a maximum compressive yield strength and microhardness of 160.9 ± 9.1 MPa and 3.73 ± 0.8 GPa, respectively.These findings demonstrated that the developed MA-SLM process might be a promising strategy for the preparation of amorphous/crystalline alloys with superior properties.

Source: Virtual and Physical Prototyping

DOI: 10.1080/17452759.2023.2220549

Authors: Chengde Gao, Shuai Tang, Shuo Zhao, Zhenyu Zhao, Hao Pan, Cijun Shuai

Institutions: Central South University, Shenzhen Institute of Information Technology, Jiangxi University of Science and Technology

Language: English

Topic: Metallic Glasses and Amorphous Alloys

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,070