文献类型：期刊文献

中文题名：小冲杆试验方法评价1.25Cr0.5Mo珠光体钢的蠕变性能

英文题名：SMALL PUNCH TESTS TO ESTIMATE THE CREEP PROPERTY OF 1.25Cr0.5Mo PEARLITIC STEELS

作者：王玉成[1];徐宏[1];刘阿龙[1];侯峰[1];张莉[1]

机构：[1]华东理工大学化工机械研究所,上海200237

年份：2006

卷号：28

期号：2

起止页码：211

中文期刊名：机械强度

外文期刊名：Journal of Mechanical Strength

收录：CSTPCD;;EI(收录号：2006209882961);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：小冲杆试验;蠕变;最小中心挠度速率;载荷系数;表面激活能;断裂寿命

外文关键词：Small punch test; Creep; Minimum deflection rate; Load exponent; Activation energy; Rupture life

摘要：对1.25Cr0.5Mo珠光体钢的小冲杆蠕变试验结果和传统蠕变试验结果进行比较。试验结果表明小冲杆蠕变试验所获得的中心挠度变形曲线与传统蠕变试验的应变变形曲线是相似的。同时也发现在相同的断裂时间下,小冲杆蠕变试验中所施加的载荷值与传统蠕变试验的应力值的比值在一定载荷范围内为一恒量。在本次研究中,一些在传统蠕变试验中常用的经验公式如Larson Miller法则、Dorn方程、Monkman Grant关系式等被用来分析小冲杆蠕变试验。所得结论与传统蠕变试验的结论是相近的。综上所述,小冲杆试验方法可以用于高温下服役材料蠕变性能的评价。
The main objective of experimental work described is the comparison of the results of conventional creep tests with those of small punch creep tests （SP-C） for 1.25Cr0.5Mo pearlitic steels. The experimental results revealed that the overall shapes of the creep curves obtained from the SP-C tests were similar to those obtained from conventional creep tests and timed out the ratio between the load of SP-C tests and the stre.ss of conventional creep tests was about 2.7 for the same ci＇eep rupture life. In this research, some empirical formula such as I.arson-Miller law, Dom equation, Monkman-Grant relation, well known from conventional creep tests, can also be applied to analyze the experimental results for SP-C tests. These analytic results relatively corresponded to those obtained from conventional creep tests. From these results the small punch creep tests have the potential to evaluate the material creep properties of structural components in-service as the non-destructive testing methods.