基于小冲孔试验的S30403高温力学性能研究

Study on Mechanical Properties of S30403 Based on Small Punch Test Technique at Elevated Temperature

小冲孔试验技术(Small Punch Test,SPT)具有取样简单快捷、经济效益好、近乎无损等优势。介绍了基于弹性能量理论预测材料屈服强度的小冲孔能量法,对试验原理及步骤进行了详细的阐述。在验证试验重复性很好的基础上对S30403不锈钢进行小冲孔能量法试验,通过试验结果和常规拉伸试验结果的对比,证明了能量法的可行性。同时利用100℃、200℃、300℃温度条件下的小冲孔试验数据对已有能量法公式进行修正,使得能量法在高温条件下同样适用。

The small punch test （SPT） technique has multiple advantages such as sampling conveniently, economically and nondestructively. A small punch energy method, based on elastic energy theory, to pre- dict the yield strength of materials was introduced. Meanwhile, an elaborate explanation on the experi- ment details was made. Verified with good testing repeatability, the small punch energy method test was given with the material of S30403 stainless steel, and the results of which was compared with that of con- ventional tensile tests in order to proof the feasibility of Energy Method. A series of tests were performed at temperatures of 100℃, 200℃ and 300℃ respectively and modified the energy method formula to make it available at elevated temperature.