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On low-cycle fatigue of austenitic steel. Part I: Changes of Poisson's ratio and elastic anisotropy
International Journal of Engineering Science ( IF 6.6 ) Pub Date : 2021-08-23 , DOI: 10.1016/j.ijengsci.2021.103567
V.V. Mishakin 1 , A.V. Gonchar 1 , K.V. Kurashkin 1 , V.A. Klyushnikov 1 , M. Kachanov 2
Affiliation  

Microstructural changes under low-cycle fatigue of a metastable austenitic steel are monitored by a combination of the acoustic parameters: Poisson's ratio (more precisely, its change) as indicator of the “diffused” damage and anisotropy change as indicator of changes of texture. Three stages of the Poisson's ratio evolution are identified; they serve as markers of the process of material degradation. A criterion of fracture in terms of a critical combination of the changes of the mentioned parameters is proposed and tested. The challenge of separating the effects of damage accumulation and of the martensitic transformation on elasticity parameters is addressed by combining acoustic monitoring with the eddy current data.



中文翻译:

奥氏体钢的低周疲劳。第一部分:泊松比和弹性各向异性的变化

亚稳态奥氏体钢在低周疲劳下的微观结构变化通过声学参数的组合进行监测:泊松比(更准确地说,它的变化)作为“扩散”损伤的指标,各向异性变化作为织构变化的指标。确定了泊松比演化的三个阶段;它们充当材料降解过程的标记。提出并测试了根据上述参数变化的临界组合的断裂标准。通过将声学监测与涡流数据相结合,解决了分离损伤累积和马氏体转变对弹性参数的影响的挑战。

更新日期:2021-08-23
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