Mechanical and Shielding Properties of an As-Cast New Pb-B Shielding Composite Materials

Yong Hua Duan; Yong Sun; Ming Jun Peng; Zhong Zheng Guo

doi:10.4028/www.scientific.net/AMR.150-151.56

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 150-151Mechanical and Shielding Properties of an As-Cast...

Mechanical and Shielding Properties of an As-Cast New Pb-B Shielding Composite Materials

Abstract:

The new type of Pb-B shielding alloys with high tensile strength and hardness were prepared by casting. The microstructure and morphology of the Pb-B alloys were investigated by scanning electron microscope (SEM) analysis. Mechanical properties and radiation shielding effect of the alloys were compared with other Pb-based shielding alloys. The results indicate that the tensile strength and hardness increased up to 116 MPa and 160 HB with the 1.0 wt.% content of B. The fractographic examination conducted by SEM indicate that the Pb-B alloys are in form of plastic fracture, and the fracture model changes from the dimple to the intergranular quasi-cleavage with the increasing of B content. Furthermore, the composites are of the excellent shielding properties. Especially at the thickness of 20 mm, the shielding ratios for γ-ray and neutron reach 49.7% and 92.7%, respectively.

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Periodical:

Advanced Materials Research (Volumes 150-151)

Pages:

56-63

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https://doi.org/10.4028/www.scientific.net/AMR.150-151.56

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Online since:

October 2010

Authors:

Yong Hua Duan, Yong Sun, Ming Jun Peng, Zhong Zheng Guo

Keywords:

Fracture, Mechanical Property, Microstructure, Pb-B Shielding Alloy, Shielding

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