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首页> 外文会议>Symposium on Creep Deformation and Fracture, Design, and Life Extension; 20050925-28; Pittsburgh,PA(US) >The Small Punch (SP) Creep Testing of Low Alloy Steels
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The Small Punch (SP) Creep Testing of Low Alloy Steels

机译：低合金钢的小冲孔（SP）蠕变测试

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摘要

The life assessment of high-energy plant relies upon obtaining information on the current condition of the materials in service. While uniaxial creep tests have been traditionally used for this purpose, small punch (SP) creep testing simplifies sample removal and allows more tests pre unit volume of material. This paper details the SP creep test method as applied to low alloy steels. The 9.5mm diameter disc specimens are loaded with a hemispherical punch. The deformation is measured using high precision transducers and produces time -deformation creep curves that are comparable to those obtained from standard uniaxial tests. Similar load and temperature dependences are also obtained. Comparison of the SP data with uniaxial results shows there to be an empirical relationship between the SP load and the equivalent uniaxial test stress. The results of this work support the development of a Code of Practice for SP testing for potential worldwide applications.
机译：高能电厂的寿命评估依赖于获取有关使用中材料的当前状况的信息。传统上为此目的使用单轴蠕变测试，而小冲孔（SP）蠕变测试简化了样品的去除，并允许在单位体积的材料上进行更多测试。本文详细介绍了适用于低合金钢的SP蠕变测试方法。直径9.5mm的圆盘试样装有半球形冲头。使用高精度传感器测量变形，并产生与从标准单轴测试获得的时间变形蠕变曲线可比的曲线。还获得了类似的负载和温度依赖性。 SP数据与单轴结果的比较表明，SP载荷与等效单轴测试应力之间存在经验关系。这项工作的结果为针对潜在的全球应用的SP测试制定了操作规范。

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