Investigation of the correlation between mechanical chip morphology and surface residual stress for Ti6Al4V alloy
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DOI 10.1007/s12206-020-2210-0
Journal of Mechanical Science and Technology 34 (10) 2020 Original Article DOI 10.1007/s12206-020-2210-0 Keywords: · Chip morphology · Residual stress · Ti6Al4V · Adiabatic shear band
Correspondence to: Z. R. Wu [email protected]
Citation: Wu, Z. R., Zhu, K. K., Pan, L., Fang, L., Song, Y. D. (2020). Investigation of the correlation between mechanical chip morphology and surface residual stress for Ti6Al4V alloy. Journal of Mechanical Science and Technology 34 (10) (2020) ?~?. http://doi.org/10.1007/s12206-020-2210-0
Received April 20th, 2020 Revised
Investigation of the correlation between mechanical chip morphology and surface residual stress for Ti6Al4V alloy Z. R. Wu, K. K. Zhu, L. Pan, L. Fang and Y. D. Song State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China
Abstract
A numerical simulation analysis of mechanical chip morphology and residual stress for Ti6Al4V alloy was conducted under different cutting speed and feed rate. Johnson-Cook constitutive model and shear failure model were selected in the simulation procedure. The correlations between the mechanical chip morphology and surface residual stress were detailed. The results show that the chip morphology characterized with the degree of serration Gs and the serrated frequency f has a direct impact on residual stress distribution. With the increase of the degree of serration Gs, the maximum residual tensile stress decreases, while with the increase of the serrated frequency f, the maximum residual compressive stress increases on the surface. The research of the present paper provides a new way to understand and evaluate residual stress distribution for titanium alloy mechanical process.
May 20th, 2020
Accepted June 1st, 2020 † This paper was presented at ICMR2019, Maison Glad Jeju, Jeju, Korea, November 27-29, 2019. Recommended by Guest Editor Insu Jeon
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
1. Introduction The service life-cycle and reliability of an aero-engine depend on the strength and fatigue properties of the components. With the improvement of the whole performance of the aeroengine, the compressor and turbine blade temperature gradually increased, the single-stage loads became higher, and the structure of key components became more complex. These factors put forward high standard requirements for the processing and manufacturing technology of materials. Current processing technology aims to control surface integrity of engine components. By controlling and optimizing cutting parameters during the machining process, surface integrity characteristics such as surface roughness, residual stress and surface microhardness can be improved. Therefore, the purpose of improving the strength and fatigue life of components can be achieved. The residual stress induced by machining is one of the important characteristic parameters in surface integrity. It has an importa
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