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| Study on mechanical properties of high tungsten advanced shielding material |
| ZHONG Jianqiang，SUN Changlong，WANG Meiling，MA Fei, HE Xueyi，WU Songling |
| （Nuclear Power Institute of China, Chengdu 610213, China） |
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Abstract The W-B4C/Al shielding material with excellent shielding performance of absorbing neutrons and
shielding gamma rays were synthesized by the power metallurgic method. The effect of high tungsten content on
the microstructure and mechanical properties of the W-B4C/Al shielding material were investigated. The results
show that most of aluminum and tungsten in the W-B4C/Al exist in single phase in the selected range of tungsten
content, and the WAl12 phase which effectively enhanced the material is presented. With the increase of tungsten
content, the tensile strength (Rm) tends to decrease. The reduction of aluminum content weaks the bonding strength
of the W-B4C/Al shielding material. When tungsten content is 80% (80W1.46B4C/Al), the prepared material exhibited
the optimum comprehensive performance: the tensile strength (Rm) is 252 MPa, the yield strength (Rp0.2) is 209
MPa, the elongation (A50mm) is 2.1%, the impact toughness is 3.0 J/cm2 and the hardness (HV5) is 95.7.
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Received: 22 November 2021
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2023, Vol. 33 
