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Welding Techniques and Residual Stresses
Research Guide
What is Welding Techniques and Residual Stresses?
Welding Techniques and Residual Stresses refers to the study of welding processes such as laser welding, gas tungsten arc welding, and electron beam welding, alongside the measurement, simulation, and effects of residual stresses generated during these processes on material microstructure and mechanical properties.
This field encompasses 83,763 papers on welding techniques and residual stresses. Research covers numerical simulation of welding processes, heat transfer, fluid flow, and optimization of parameters affecting microstructure and fatigue performance. Key methods include finite element modeling of heat sources and diffraction-based residual stress measurement.
Topic Hierarchy
Research Sub-Topics
Residual Stress Measurement Welding
This sub-topic addresses techniques like X-ray diffraction, neutron diffraction, and hole-drilling for quantifying residual stresses in welded components. Researchers develop and validate methods to accurately map stress distributions post-welding.
Numerical Simulation Welding Processes
This sub-topic involves finite element modeling of heat transfer, fluid flow, and phase transformations during welding. Researchers simulate weld pool dynamics, keyhole formation, and parameter optimization using computational tools.
Laser Welding Microstructure Evolution
This sub-topic examines microstructural changes in laser-welded materials, including grain refinement, phase transformations, and defect formation. Researchers study the effects of laser parameters on material properties in alloys like Ti-6Al-4V.
Welding Residual Stress Fatigue
This sub-topic analyzes how residual stresses from welding influence fatigue life and crack propagation in structures. Researchers model stress-fatigue interactions and develop mitigation strategies like post-weld treatments.
Gas Tungsten Arc Welding Optimization
This sub-topic focuses on optimizing GTAW parameters for improved weld quality, including current, shielding gas, and travel speed. Researchers apply design of experiments and AI for process control and defect minimization.
Why It Matters
Residual stresses from welding influence fatigue performance and structural integrity in industries like aerospace and automotive. For instance, Mercelis and Kruth (2006) in "Residual stresses in selective laser sintering and selective laser melting" analyzed how these stresses arise in additive manufacturing, impacting part distortion and requiring process controls. Goldak et al. (1984) in "A new finite element model for welding heat sources" provided a model used in simulations to predict and mitigate stresses, enabling safer designs for large metallic components as in Williams et al. (2015) "Wire + Arc Additive Manufacturing", which deposits over 10 kg components in titanium and steel with high deposition rates.
Reading Guide
Where to Start
"A new finite element model for welding heat sources" by Goldak et al. (1984), as it provides the foundational numerical approach to modeling welding heat inputs and stresses, essential for understanding simulations across techniques.
Key Papers Explained
Goldak et al. (1984) "A new finite element model for welding heat sources" establishes heat source modeling, which DebRoy et al. (2017) "Additive manufacturing of metallic components – Process, structure and properties" extends to laser-based additive processes linking to residual stresses. Mercelis and Kruth (2006) "Residual stresses in selective laser sintering and selective laser melting" builds on these by quantifying stresses in SLM/SLS, while Noyan and Cohen (1987) "Residual Stress: Measurement by Diffraction and Interpretation" offers measurement methods to validate simulations. Williams et al. (2015) "Wire + Arc Additive Manufacturing" applies arc welding models to large-scale builds.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Current work emphasizes integrating melt flow physics from Khairallah et al. (2016) "Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones" with stress models for pore-free welds. Focus remains on optimizing parameters for fatigue resistance in additive techniques like those in DebRoy et al. (2017).
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Additive manufacturing of metallic components – Process, struc... | 2017 | Progress in Materials ... | 7.6K | ✓ |
| 2 | Initial reports of the deep sea drilling project | 1971 | Marine Geology | 4.0K | ✕ |
| 3 | A new finite element model for welding heat sources | 1984 | Metallurgical Transact... | 3.1K | ✕ |
| 4 | A study of the microstructural evolution during selective lase... | 2010 | Acta Materialia | 2.8K | ✕ |
| 5 | Laser powder-bed fusion additive manufacturing: Physics of com... | 2016 | Acta Materialia | 2.5K | ✓ |
| 6 | Recent developments in stainless steels | 2009 | Materials Science and ... | 2.2K | ✕ |
| 7 | Residual Stress: Measurement by Diffraction and Interpretation | 1987 | — | 2.1K | ✕ |
| 8 | Recent advances in friction-stir welding – Process, weldment s... | 2008 | Progress in Materials ... | 2.0K | ✕ |
| 9 | Residual stresses in selective laser sintering and selective l... | 2006 | Rapid Prototyping Journal | 1.9K | ✓ |
| 10 | Wire + Arc Additive Manufacturing | 2015 | Materials Science and ... | 1.7K | ✓ |
Frequently Asked Questions
What causes residual stresses in laser-based welding techniques?
Residual stresses in selective laser sintering and melting originate from rapid heating and cooling cycles during the process. Mercelis and Kruth (2006) in "Residual stresses in selective laser sintering and selective laser melting" used a theoretical model to show these stresses develop due to thermal gradients and phase transformations. Mitigation involves optimizing scan strategies and build parameters to balance expansion and contraction.
How are welding heat sources modeled numerically?
Goldak et al. (1984) introduced a double ellipsoidal finite element model for welding heat sources in "A new finite element model for welding heat sources". This model accurately represents the heat distribution in the weld pool for processes like gas tungsten arc welding. It enables simulations of temperature fields, residual stresses, and distortions.
What is the role of residual stress measurement by diffraction?
Noyan and Cohen (1987) in "Residual Stress: Measurement by Diffraction and Interpretation" detail X-ray and neutron diffraction techniques to quantify residual stresses in welded components. These methods detect lattice strain non-destructively. Interpretation accounts for stress gradients and material texture effects.
How do residual stresses affect additive manufacturing of metals?
DebRoy et al. (2017) in "Additive manufacturing of metallic components – Process, structure and properties" link residual stresses to process parameters influencing microstructure and properties. High stresses can cause cracking or warping in laser powder-bed fusion. Control through preheating and parameter optimization improves part reliability.
What are key applications of wire + arc additive manufacturing?
Williams et al. (2015) in "Wire + Arc Additive Manufacturing" describe using arc welding tools for depositing large components over 10 kg in titanium, aluminum, and steel. This technique offers high deposition rates and low costs. It applies to aerospace and marine structures where residual stress management ensures mechanical performance.
Open Research Questions
- ? How can finite element models improve prediction of keyhole formation and melt pool dynamics in laser welding to reduce residual stresses?
- ? What microstructural changes during friction-stir welding minimize residual stresses while enhancing fatigue performance?
- ? How do process parameters in wire + arc additive manufacturing interact with heat transfer to control residual stress distributions in large components?
- ? Which diffraction techniques best resolve residual stress gradients near weld interfaces in multi-pass welds?
- ? How do spatter and denudation zones in laser powder-bed fusion contribute to inhomogeneous residual stress fields?
Recent Trends
The field spans 83,763 papers with sustained focus on numerical simulation and residual stress effects in laser and arc welding.
High-citation works like DebRoy et al. "Additive manufacturing of metallic components – Process, structure and properties" (7593 citations) and Goldak et al. (1984) "A new finite element model for welding heat sources" (3138 citations) indicate ongoing reliance on established models amid additive manufacturing growth.
2017No recent preprints or news in the last 12 months signal steady rather than accelerating publication rates.
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