1·The fracture toughness of the alloys was measured on single-edge notched beam and cracked beam specimens.
采用缺口和裂纹两种试样测定合金的断裂韧性；
2·The impact test of the pendulum is used to strike the notched specimens of the cantilever beam with a prescribed height, and the test of impact absorbing power when the specimen is broken.
艾氏冲击试验：用规定高度的摆锤对处于悬臂梁状态的缺口试样进行一次性打击，测量试样折断时冲击吸收功的试验。
3·Charpy impact test (V gap) : the specified height of pendulum of the one-time blow to V notched specimens in beam state, test specimen is broken by the impact absorbing energy.
夏比(V型缺口)冲击试验：用规定高度的摆锤对处于简支梁状态的V型缺口试样进行一次性打击，测量试样折断时冲击吸收功的试验。
4·One or more of the cross-beam wall portions have a notched opening formed at a selected location along a length of the first or second cross-beam wall portions.
所述横梁壁部分的具有沿着所述第一或第二横梁壁部分的长度在选定位置处形成的一个或多个凹口。