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SUS306不锈钢热疲劳损伤的超声无损评价

Ultrasonic nondestructive evaluation to the thermal fatigue damage of SUS306 stainless steel

  • 摘要: 对经过高温热处理和断裂拉伸实验的SUS306不锈钢模拟试样进行了接触法高频超声测试,对获得的超声反射波信号进行分析,得到了相应的超声波衰减系数与试样平均晶粒尺寸、断裂伸长率之间的关系,对利用超声脉冲反射技术进行材料热疲劳损伤进展的无损评价具有实际意义。

     

    Abstract: The high frequency ultrasonic test of using direct contact method to SUS306 stainless steel samples,which were treated by high temperature heat treatment and stretch experiment,is described in this paper.The ultrasonic attenuation coefficient,average grain diameter and elongation at breaking of the sample being tested are obtained through echo analysis.The relationships between average grain diameter,elongation at breaking and ultrasonic attenuation coefficient of samples are also established.These results are expected to be useful for early assessment of material thermal fatigue damage advance.

     

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