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| Analysis on the performance of a tungsten-based high density alloy fastener |
| LIN Bing-tao1，ZHANG Jia-hua2，LI Yuan3，WANG Ling1，SUN Xiao-xia4，QIN Ying-nan1 |
| 1Advanced Technology & Materials Co.，Ltd.，Beijing 100081，China；2Science and Technology on Space
Physics Laboratory，Beijing 100076，China；3 Beijing Institute of Aerospace Control Devices，Beijing
100039，China；4 China University of Labor Relations，Beijing 100048，China |
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Abstract 93W-5Ni-2Fe tungsten alloy for fasteners was taken as the research object. The low mechanical properties
of products in the process of product testing were analyzed and verified，providing reference for failure analysis
and quality control of tungsten alloy fasteners. The results show that the high sintering temperature is the fundamental
reason for the low properties of tungsten alloy. As a result，the tungsten particles grow abnormally，the microstructure
is not uniform，the bonding layer becomes thicker and the tensile strength of the material decreases.
The fracture of tungsten alloy is mainly caused by theW-W interface separation，which is a typical brittle fracture.
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Received: 02 June 2020
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2020, Vol. 30 
