Metastability and fatigue behavior of austenitic stainless steels
Metastability and fatigue behavior of austenitic stainless steels
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奥氏体不锈钢的亚稳态和疲劳行为
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Klein
中科院分区：
文献类型：
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作者：
M. Smaga;Annika Boemke;T. Daniel;M. Klein
本文详细研究了几种奥氏体钢（AISI 304、AISI 321、AISI 348和两批AISI 347）在固溶退火状态下的亚稳性和变形诱导α′-马氏体形成的敏感性。除了通过计算堆积断层能量和阈温度（指定为ms和md30）来表征亚稳性的传统方法外，本工作还引入了一种确定α ' -马氏体形成敏感性的新方法。该方法基于动态应用局部塑性变形和无损微磁测量α′-马氏体含量。建立了I ξ参数，该参数与循环加载过程中α′-马氏体形成的等级有很好的相关性。研究了不同亚稳奥氏体钢循环加载试样在室温下的循环变形和相变行为。研究了应变速率对循环变形和相变行为的影响。在疲劳试验中，除了进行应力-应变迟滞和温度测量外，还进行了原位微磁测量。利用压缩实测数据，分析了试样塑性自热和应变速率对α′-马氏体形成的影响。
This study presents the results of a detailed investigation of metastability and susceptibility to deformation induced α’-martensite formation of several austenitic steels (AISI 304, AISI 321, AISI 348 and two batches from AISI 347) in the solution-annealed state. Besides conventional characterization of metastability by calculating stacking-fault energy and threshold temperature (designated as M S and M d30 ), the present work introduced a new method for determining susceptibility to α’-martensite formation. The method was based on dynamically applied local plastic deformation and non-destructive micro-magnetic measurement of α’-martensite content. The parameter I ξ was established, which correlated very well with the grade of α’-martensite formation during cyclic loading. The cyclic deformation and phase transformation behavior of cyclically loaded specimens from different metastable austenitic steels were investigated in total-strain and stress controlled fatigue tests with load ratio R = -1 at ambient temperature. The influence of the strain rate on the cyclic deformation and phase transformation behavior was also examined. During the fatigue tests, besides stress-strain hysteresis and temperature measurement, in situ micro-magnetic measurements were performed. Using the compressive measured data, the influence of plastic induced self-heating of the specimen and the strain rate on α’-martensite formation was analyzed.
影响因子：
6
作者：
Grigorescu, A. C.;Hilgendorff, P. -M.;Christ, H. -J.
通讯作者：
Christ, H. -J.