Measurement of Pre-Self-Balanced Surface Residual Stresses Induced by Milling in Titanium Alloys and the FEM Validation

Abstract:

Flank milling was used to machine titanium alloy workpieces, and there would be high residual stresses induced by milling in the superficial layer of the workpieces. Corrode the stress layers gradually and measure the changes of workpiece’s bending deflection during the corrosion process. With reverse thinking, calculate the stress values in the upper layers based on the values in the bottom layers and the changes of the bending deflection. At last, the stress values got by this method are prior to the self-balanced state, so the result rules out the factors of the workpiece’ size and shape. The deformations of workpieces with different sizes and shapes can be predicted accurately based on the stress values got by this method. The correctness of the method has been verified by Finite Element Method(FEM).

• Periodical: Advanced Materials Research (Volume 996)
• Pages: 615-621
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.996.615
• Online since: August 2014
• Authors: Long Hui Meng*, Ning He, Liang Li, Yin Fei Yang, Wei Zhao
• Keywords: Bending Deflection, Corrosion, Finite Element Method (FEM), Residual Stress

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