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| Effect of machining on residual stress on the surface of powder metallurgy beryllium |
| HUANG Xugang，LI Zhinian，LIU Zhaogang |
| （State Key Laboratory of Special Rare Metal Material, Northwest Rare Metal Materials Institute，Shizuishan
753000, China） |
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Abstract Beryllium has the characteristics of low density and high elastic modulus. It is used in aerospace structure.
The residual stress on the surface of powder metallurgy beryllium during machining has a direct effect on the
dimensional stability and service life of beryllium structural parts.In this paper, the residual stress on the surface of
beryllium was measured by X-ray diffractometer, and the distribution of the residual stress along the surface under
the processes of roughing, finishing and aging was measured. It is found that the residual stress of beryllium in
powder metallurgy is compressive stress, and the residual stress is negatively related to the linear velocity and positively
related to the feed rate, it can also effectively improve the uniformity of residual stress.
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Received: 24 February 2022
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2023, Vol. 33 
