Bauschinger Effect in an Austenitic Steel: Neutron Diffraction and a Multiscale Approach

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• 作者：Jamal Fajoui ; David Gloaguen ; Vincent Legrand…
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：47
• 期：5
• 页码：2024-2036
• 全文大小：1,986 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940
• 卷排序：47

文摘

The generation of internal stresses/strains arising from mechanical deformations in single-phase engineering materials was studied. Neutron diffraction measurements were performed to study the evolution of intergranular strains in austenitic steel during sequential loadings. Intergranular strains expand due to incompatibilities between grains and also resulting from single-crystal elastic and plastic anisotropy. A two-level homogenization approach was adopted in order to predict the mechanical state of deformed polycrystals in relation to the microstructure during Bauschinger tests. A mechanical description of the grain was developed through a micro–meso transition based on the Kröner model. The meso–macro transition using a self-consistent approach was applied to deduce the global behavior. Mechanical tests and neutron diffraction measurements were used to validate and assess the model.Manuscript submitted July 8, 2015.