摘要
为评价辐照对B_4C/Al中子吸收材料力学性能的影响,测试了B_4C/Al中子吸收材料辐照前后的硬度、拉伸性能,并采用扫描电子显微镜(SEM)进行断口观察和显微组织分析,探讨断裂机理。结果表明:辐照后B_4C/Al中子吸收材料洛氏硬度升高,屈服强度上升37 MPa,抗拉强度上升32 MPa,断裂伸长率下降3.6%;辐照前后B_4C/Al中子吸收材料拉伸试样均为脆性断裂;辐照后Al基体的位错增殖以及B_4C颗粒与Al基体界面变化是导致B_4C/Al中子吸收材料力学性能提高的主要原因。
To get the mechanical properties of B_4C/Al material, the tensile performance and hardness of neutron irradiated B_4C/Al were studied. Fracture appearance was investigated by scanning electron microscope. The result shows that irradiated Rockwell hardness was raised, and the yield and the tensile strength increased 37 MPa and 32 MPa, respectively. The elongation at break descended 3.6%. The B_4C/Al material was brittle fracture before and after irradiation. Dislocation density increased and aluminum atoms in the enrichment of boron carbide particles surface diffusion was a major cause for the mechanics performance improvement of the boron aluminum material.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2017年第S1期129-132,共4页
Nuclear Power Engineering
