Residual stress mapping in Inconel 625 fabricated through additive manufacturing: Method for neutron diffraction measurements to validate thermomechanical model predictions

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• 作者：Zhuqing Wang^a ; Erik Denlinger^b ; Panagiotis Michaleris^b ; Alexandru D. Stoica^c ; Dong Ma^c ; Allison M. Beese^a ; ^{beese@matse.psu.edu}
• 关键词：Additive manufacturing ; Inconel 625 ; Residual stress ; Neutron diffraction ; Thermomechanical modeling
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：5 January 2017
• 年：2017
• 卷：113
• 期：Complete
• 页码：169-177
• 全文大小：1296 K
• 卷排序：113

文摘

Reference lattice spacings in neutron diffraction measurements can be determined from mechanically stress-relieved samples. Stress-relief heat treatments change reference lattice spacings by modifying the microstructure of reference samples. In additive manufacturing (AM), thermal history and therefore elemental composition vary with position. Location-dependent reference lattice spacings must be measured in AM due to chemical and microstructural heterogeneity. Neutron diffraction and thermomechanical modeling are complementary techniques to determine residual stress.