论文部分内容阅读
通过B4C/Al中子吸收材料在室温至350℃的拉伸试验,分析了该材料的拉伸断裂主要影响因素,阐述了B4C颗粒粒度对拉伸断裂的影响。结果表明,温度对B4C/Al材料拉伸性能有明显影响,该中子吸收材料是低塑性材料,但与国外同类材料相比拉伸性能优良;大颗粒B4C与基体的协调变形能力差,拉应力下B4C和基体铝界面易产生剪切应力,使其与基体脱离开;B4C/Al材料在拉伸过程中,裂纹首先在大颗粒B4C与Al基体的界面处产生。
Through the tensile test of B4C / Al neutron absorbing material at room temperature to 350 ℃, the main influencing factors of tensile fracture of the material were analyzed, and the influence of B4C particle size on the tensile fracture was analyzed. The results show that the temperature has a significant effect on the tensile properties of B4C / Al materials. The neutron absorber is a low plasticity material, but its tensile properties are superior to those of foreign materials. The coordination deformation capacity of B4C / Under the stress, the shear stress tends to be generated at the interface between the B4C and the matrix aluminum, which is separated from the matrix. During the stretching process of the B4C / Al material, the crack first occurs at the interface between the large particles B4C and the Al matrix.