Experimental Study on Residual Stress and Deformation Control During Machining of TC18 Titanium Alloy Long Axis
Xiangyou Xue, Dongyan Shi, Liang Zhao
TL;DR
This study explores how to control deformation and residual stress in titanium alloy machining through optimized turning and heat treatment parameters.
Contribution
The paper proposes optimal turning and heat treatment strategies to minimize deformation in TC18 titanium alloy slender shafts.
Findings
Between-centers turning with specific parameters reduces deformation and improves surface quality.
Heat treatment at 640–680 °C with vertical placement reduces deformation by 50% compared to free placement.
Optimal turning parameters include a cutting speed of 640–800 r/min and a feed rate of 0.05–0.1 mm/r.
Abstract
The residual stress induced during the processing of titanium alloy materials can significantly influence the deformation control of precision-machined workpieces, especially for workpieces characterized by low stiffness and high-precision requirements. In this study, TC18 titanium alloy forgings with a dense structure were manufactured via forging. By conducting turning and heat treatment experiments on the workpiece, the distribution and evolution of residual stress and the deformation characteristics of TC18 titanium alloy on slender shafts were systematically investigated under different turning and heat treatment conditions. Based on the experimental results, the effects of the turning parameters, including feed rate, cutting speed, cutting depth, and axial thrust force of machine tool center, on workpiece deformation were quantitatively analyzed, and an optimal heat treatment…
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Taxonomy
TopicsTitanium Alloys Microstructure and Properties · Welding Techniques and Residual Stresses · Advanced Welding Techniques Analysis