Comparison of Residual Stress Measured by Diffraction Method and Matrix Etching Method in SiC Fiber Reinforced Titanium Matrix Composites

Abstract:

Measurement and modeling of residual stresses in SiC fiber reinforced titanium matrix composites (SiC_f/Ti) are still a challenge. Diffraction method and matrix etching method can characterize the strains of matrix and fiber, respectively. A In this work, SiC_f/Ti samples with perpendicular and parallel cross-sections to the fibers have been fabricated, and the residual stresses were measured by X-ray diffraction and matrix etching. The results showed that the axial matrix stress in sample with perpendicular cross-sections to the fibers was larger than that in sample with parallel cross-sections to the fibers, while the axial matrix stress calculated from etching was consistent with that from X-ray diffractions based on triaxle stress model, confirming the reliability of triaxle stress model.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 865-871
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.865
• Online since: June 2017
• Authors: Mao Wen, Hao Huang, Hu Li, Ming Wu, Chao Quan Hu, Kan Zhang, Wei Tao Zheng
• Keywords: Matrix Etching Method, Residual Stress, SiC Fiber Reinforced Titanium Matrix Composites, X-Ray Diffraction Method

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