Residual Stress Control in Hybrid Manufacturing Processes

Rahul Mehta

Residual Stress Control in Hybrid Manufacturing Processes

Author(s)	Dr. Rahul Mehta
Country	United States
Abstract	Hybrid manufacturing combines two or more complementary processing mechanisms—commonly additive deposition with milling, turning, grinding, rolling, heat treatment, or other secondary operations—to exploit the geometrical flexibility of additive manufacturing while achieving improved dimensional accuracy, surface integrity, and material performance. A central challenge is the development and redistribution of residual stress. Rapid localized heating and cooling during metallic additive manufacturing generate steep thermal gradients, constrained shrinkage, and repeated thermal cycling, while subsequent machining introduces additional mechanical and thermal loads at the near-surface region. Residual tensile stresses may promote distortion, dimensional instability, cracking, delamination, or reduced fatigue resistance, whereas deliberately introduced compressive surface stresses can be beneficial in selected applications. This conceptual–methodological paper develops an integrated residual-stress-control framework for hybrid manufacturing based on thermal-gradient reduction, deposition-path planning, interpass temperature management, sequencing of additive and subtractive operations, controlled material removal, mechanical deformation, stress-relief treatment, and measurement-informed process adaptation. Published research shows that substrate preheating and scan-strategy control can reduce additive-manufacturing thermal gradients, while hybrid wire-arc additive–milling studies demonstrate that suitable machining conditions can substantially alter surface residual stress. Interpass and post-build rolling provide an additional mechanical pathway for reducing distortion in suitable wire-based additive systems. A simulated analysis compares three progressive control strategies using hypothetical residual-stress distributions. Because no experimental manufacturing dataset was supplied, all quantitative values are explicitly illustrative. The study concludes that residual stress should be treated as a process-history variable that evolves throughout deposition, cooling, machining, mechanical treatment, unclamping, and final heat treatment rather than as a defect addressed only after manufacturing.
Keywords	residual stress, hybrid manufacturing, additive–subtractive manufacturing, directed energy deposition, machining, stress relief, distortion control, process planning.
Field	Engineering
Published In	Volume 7, Issue 4, July-August 2026
Published On	2026-08-19

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American Journal of Advanced Multidisciplinary Innovation and Research

A Widely Indexed Open Access Peer Reviewed Multidisciplinary Bi-monthly Scholarly International Journal

Residual Stress Control in Hybrid Manufacturing Processes

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