Improvement surface integrity and high cycle fatigue performance of the additively repaired titanium alloy by shot peening
Source abstract
Abstract
The non-uniform structure and residual stresses significantly limit the fatigue performance of titanium alloy additively repaired components. In this study, shot peening (SP) surface treatment was applied to arc additive repair titanium alloy components to enhance their service life, and improvement mechanisms of surface integrity and fatigue performance were investigated. Results revealed that SP induced a high density of dislocations throughout the repaired component, and the continuous dislocation evolution led to a significant microstructure refinement. These refined structures, including nanoscale twins and stacking faults, exhibited a gradient in a specific depth direction. The hardness and compressive residual stress (CRS) of this gradient structure were significantly enhanced, with its depth exceeding 200 μm. Due to the synergistic effect of the gradient microstructure and CRS enhancement, the instant fracture zone decreased from 2.726 mm 2 to 2.094 mm 2 , and the crack initiation site shifted from the free surface to a subsurface location about 103.46 μm beneath the surface, resulting in a significant increase in the fatigue limit of the repaired component to 602.16 MPa.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Surface Treatment and Residual Stress · Additive Manufacturing Materials and Processes · Erosion and Abrasive Machining
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. A review on wire and arc additive manufacturing of titanium alloy10.1016/j.jmapro.2021.08.018 ↗
2. Microstructure distribution characteristics of LMD-WAAM hybrid manufacturing Ti-6Al-4V alloy10.1016/j.optlastec.2023.109567 ↗
3. Multiobjective optimization of RMD welding parameters for ASTM A387 steel using taguchi method and artificial neural networks10.1016/j.measurement.2025.120114 ↗
4. A comparative study of additive manufacturing techniques: residual stress and microstructural analysis of CLAD and WAAM printed Ti–6Al–4V components10.1016/j.matdes.2015.09.115 ↗
5. Progress and perspectives in laser additive manufacturing of key aeroengine materials10.1016/j.ijmachtools.2021.103804 ↗
6. Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects10.1016/j.engfracmech.2023.109467 ↗
7. High fatigue resistance in a titanium alloy via near-void-free 3D printing10.1038/s41586-024-07048-1 ↗
8. Optimizing wire electrical discharge machining performance of inconel 625 with genetic algorithms & particle swarm optimization10.1016/j.jmrt.2024.06.079 ↗
9. The effect of laser shock peening, shot peening and their combination on the microstructure and fatigue properties of Ti-6Al-4V titanium alloy10.1016/j.ijfatigue.2021.106465 ↗
10. Theoretical and experimental studies of fretting‐initiated fatigue failure of aeroengine compressor discs10.1111/j.1460-2695.1994.tb00253.x ↗
11. Quasi-in-situ observation for the plastic deformation response to laser shock peening in LDED Ti6Al4V alloy10.1016/j.scriptamat.2026.117204 ↗
12. Multiaxial fatigue life prediction based on effective factor with shear/axial stress ratio for Ti60 titanium alloy in very high cycle regime10.1016/j.ijfatigue.2024.108312 ↗
13. Comparative study of very high cycle tensile and torsional fatigue in TC17 titanium alloy10.1016/j.ijfatigue.2020.105720 ↗
14. High cycle fatigue property of Ti-600 alloy at ambient temperature10.1016/j.jallcom.2010.10.144 ↗
15. Additive manufacturing-based repair of IN718 superalloy and high-cycle fatigue assessment of the joint
16. Effect of surface high density twin microstructure induced by shot peening on the fatigue behavior of Ti-6Al-4V10.1016/j.jmrt.2024.03.234 ↗
17. Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading10.1016/j.ijfatigue.2022.107331 ↗
18. Microstructures and mechanical properties of β forging Ti17 alloy under combined laser shock processing and shot peening10.1016/j.surfcoat.2017.08.069 ↗
19. Effect of shot peening and vibration finishing on the fatigue behavior of TC17 titanium alloy at room and high temperature10.1016/j.ijfatigue.2021.106391 ↗
20. Evolution of surface integrity and fatigue properties after milling, polishing, and shot peening of TC17 alloy blades10.1016/j.ijfatigue.2020.105630 ↗
21. Enhancement of fatigue properties of selective laser melting fabricated TC4 alloy by multiple shot peening treatments10.1016/j.ijfatigue.2024.108215 ↗
22. Synergetic effects of shot peening and nitrogen ion implantation on the fatigue behavior of TC17 titanium alloy10.1016/j.matchar.2026.116121 ↗
23. Microstructure and texture evolution during solidification processing of Ti–6Al–4V10.1016/S0924-0136(02)00865-8 ↗
24. Gradient microstructure response in different phases of Ti2AlNb alloy with laser shock peening
25. Additive manufacturing of metals: microstructure evolution and multistage control10.1016/j.jmst.2021.06.011 ↗
26. Thermomechanical processing of beta titanium Alloys—An overview10.1016/S0921-5093(97)00783-1 ↗
27. Effects of low-power laser hardening on the mechanical and metallurgical properties of biocompatible SAE 420 steel10.1016/j.jmrt.2024.03.153 ↗
28. A continuum model for dislocation dynamics incorporating frank–read sources and hall–petch relation in two dimensions10.1016/j.ijplas.2014.04.013 ↗
29. Additional dislocation slip determined excess yield stress in titanium
30. Phase transformation and structural evolution in a Ti-5at.% Al alloy induced by cold-rolling10.1016/j.jmst.2020.02.032 ↗
31. High-performance integrated additive manufacturing with laser shock peening –Induced microstructural evolution and improvement in mechanical properties of Ti6Al4V alloy components10.1016/j.ijmachtools.2019.103475 ↗
32. The onset of twinning in metals: a constitutive description10.1016/S1359-6454(01)00300-7 ↗
33. Proposed mechanism of HCP → FCC phase transition in titianium through first principles calculation and experiments10.1038/s41598-018-20257-9 ↗
34. Influence of lowering basal stacking fault energy on twinning behaviours10.1016/j.actamat.2022.118637 ↗
35. Microstructural characterisation of metallic shot peened and laser shock peened Ti–6Al–4V10.1016/j.actamat.2016.10.044 ↗
36. Effect of ARB process on the plane stress fracture toughness, creep properties and forming limit diagram of Aluminum/BN/Copper composite strips10.1088/1402-4896/ad6498 ↗
37. About the role of residual stresses and surface work hardening on fatigue ΔKth of a nitrided and shot peened low-alloy steel10.1016/j.surfcoat.2007.11.015 ↗
38. The influence of defects on high cycle fatigue of metallic materials10.1016/S0924-0136(03)00409-6 ↗
39. Enhanced surface and mechanical properties of bioinspired nanolaminate graphene-aluminum alloy nanocomposites through laser shock processing for engineering applications10.1016/j.mtcomm.2018.04.010 ↗
40. Appearance of reinforcement, interfacial product, heterogeneous nucleant and grain refiner of MgAl2O4 in aluminium metal matrix composites10.1016/j.jmrt.2023.07.121 ↗
41. The role of grain boundaries on fatigue crack initiation – an energy approach10.1016/j.ijplas.2010.09.009 ↗
42. Synergetic effect of laser shock and shot peening on fretting fatigue of Ti-6Al-4V dovetail joints: simulation and prediction10.1016/j.optlastec.2025.114255 ↗
43. A review on the fatigue cracking of twin boundaries: crystallographic orientation and stacking fault energy10.1016/j.pmatsci.2022.101011 ↗
44. Influence of residual stress and its relaxation on the corrosion bending fatigue resistance of EA4T axle steel treated by ultrasonic surface rolling10.1016/j.ijfatigue.2023.107561 ↗
45. Oxygen-dislocation interaction-mediated nanotwinned nanomartensites in ultra-strong and ductile titanium alloys10.1016/j.mattod.2024.04.003 ↗
46. History-independent cyclic response of nanotwinned metals10.1038/nature24266 ↗
47. Fatigue behavior of columnar-grained Cu with preferentially oriented nanoscale twins10.1016/j.actamat.2012.11.015 ↗
48. Recent progress in gradient-structured metals and alloys10.1016/j.pmatsci.2023.101194 ↗
49. Effect of micro-shot peening, conventional shot peening and their combination on fatigue property of EA4T axle steel10.1016/j.jmatprotec.2019.116320 ↗
50. Improvement of gradient microstructure and properties of wire-arc directed energy deposition titanium alloy via laser shock peening