four-point

Heat treatment and pre-strain, tensile test of the material and four point bending test have been carried to obtain the mechanical property of the undegraded and degraded material at low temperature.

本文首先通过分析复合脆化验、拉伸验和缺口试件四点弯曲验的结果，考察比较某核力容器钢在脆化前后的室温和低温力学性能。