The influence of laser shock peening on corrosion-fatigue behaviour of wire arc additively manufactured components

Ermakova, Anna; Braithwaite, Jarryd; Razavi, Javad; Ganguly, Supriyo; Berto, Filippo; Mehmanparast, Ali

doi:10.1016/j.surfcoat.2023.129262

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…The PC region was further analyzed by SEM. It can be seen that the PC region was relatively smooth and flat with obvious 'beach marks', which is consistent with the findings in [27]. This is because during the process of fatigue crack propagation, the traces corresponding to the loading history were left on the fracture surface, forming alternating light and dark bands.…”

Section: Relationships Between Microstructure and Cryogenic Fracture ...supporting

confidence: 87%

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Zhou,

Wu,

et al. 2023

Mater. Res. Express

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The cryogenic fracture toughness of the SA645/304L dissimilar weld, produced using continuous wave IPG fiber laser welding with a 0.3 mm beam offset towards the 304L side, and the microstructural effects on the fracture behavior were systematically investigated. The weld metal consists of ∼89% columnar dendritic martensite and ∼11% retained austenite (RA), where the ununiform distribution of constituent phases as well as the distinctions between martensite and RA in terms of morphology and mechanical properties lead to the microstructure heterogeneity of weld metal. Pop-in phenomenon appears on the Force-Displacement (F-V) curve during the crack tip opening displacement (CTOD) test for the weld. The CTOD value for the weld is ∼0.057 mm, about 8 times less than that when pop-in effect is ignored (∼0.563 mm). Rapid propagation of the pre-fatigue crack tip along the center of the weld leads to the pop-in phenomenon. Fracture surface in pre-fatigue crack tip (PCT) region shows quasi-cleavage features, while fracture surface in stable crack propagation (SCP) region presents a ductile-fractured surface with dimples. The crack propagation path in SCP region is frequently deflected. Inhibition effect of grain boundaries on crack propagation and TRIP effect of retained austenite (RA) result in the improvement in fracture toughness of the SCP region.

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Section: Relationships Between Microstructure and Cryogenic Fracture ...supporting

confidence: 87%

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Zhou,

Wu,

et al. 2023

Mater. Res. Express

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“…Moreover, due to the high tunability of the processing parameters, it enables also the welding of dissimilar materials that in general are difficult to join, such as aluminum alloys and steel 13 . Still concerning the materials aspect, the CMT process has been investigated for various materials and alloys such as steel [14][15][16][17][18][19] , nickel superalloys, 20,21 and light alloys based on magnesium 13 , aluminum, 22,23 and titanium [24][25][26] . Among the latter, Ti6Al4V titanium alloy could represent a very interesting case study: this α + β alloy is well known for its outstanding mechanical properties and it is used in plenty of sectors 27 , but in relation to the traditional manufacturing paradigms it implies huge costs in terms of produced waste and machining difficulties so that, for instance, in the case of the aerospace sector it implies a high buy-to-fly ratio 28 .…”

Section: Introductionmentioning

confidence: 99%

Effect of energy input on fatigue crack growth behavior of titanium alloy Ti6Al4V made by WAAM‐CMT

El Hassanin,

Campatelli,

Sepe

et al. 2024

Fatigue Fract Eng Mat Struct

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This work deals with the investigation and characterization of Ti6Al4V parts produced with an intriguing manufacturing process belonging to the Wire Arc Additive Manufacturing (WAAM) family: the Cold Metal Transfer technology (CMT). Wall‐shaped parts were produced according to different process parameters, namely the wire feed speed and voltage–current combinations, leading to different energy inputs. The parts were characterized in terms of surface morphology, microhardness, microstructure, tensile properties, and fatigue crack growth. The results suggested that the investigated deposition parameters led to similar results. Moreover, the mechanical and fatigue crack growth behavior was in line with parts of the same alloy produced through other manufacturing routes, whereas the microstructure type was the result of the fast cooling of the molten material. Finally, considering the simple system adopted to avoid oxidation during the deposition stage, the results suggested that CMT is a promising manufacturing technique for titanium alloy semifinished parts.

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“…Carbon steel, known for its excellent mechanical properties and versatility, is a key material used in a wide range of engineering applications. As WAAM becomes more widely used for manufacturing lattice structures, it becomes crucial to investigate and comprehend the fatigue behavior of WAAMprocessed carbon steel [7][8][9][10]. It is important to understand the failure mechanisms of WAAM carbon steel [11].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Resistance Assessment of WAAM Carbon Steel

Hietala,

Rautio,

Jaskari

et al. 2024

KEM

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This study presents a comprehensive exploration of the fatigue resistance of wire arc additive manufacturing (WAAM) carbon steel for lattice structures. Microstructural analysis unveils substantial grain dimensions characterized by a distinctive crystallographic configuration. These grains exhibit equiaxed characteristics, demonstrating uniform dimensions in all directions. The prevailing microstructure is dominated by ferrite grains. In tandem with the microstructural insights, hardness evaluations were conducted in correspondence with the part's deposition direction. The analysis of these measurements unveiled a consistent base material hardness of approximately 159 HV. The uniform distribution of hardness profiles supports the deduction that WAAM carbon steel uniformly embodies strength attributes. This congruence aligns harmoniously with the uniform microstructure evident in microscopic analyses. The yield strength of the WAAM carbon steel exhibits higher values in the build direction, peaking at 392 MPa. The bending fatigue tests revealed a fatigue limit approximating 180 MPa for WAAM carbon steel, evident in both the build and deposition directions. Fatigue strength of WAAM carbon steel mirrors that observed for reference material S355MC steel sheet.

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The influence of laser shock peening on corrosion-fatigue behaviour of wire arc additively manufactured components

Cited by 13 publications

References 36 publications

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Effect of microstructure heterogeneity on the cryogenic fracture toughness of the dissimilar joint between SA645 and 304L made by laser welding

Effect of energy input on fatigue crack growth behavior of titanium alloy Ti6Al4V made by WAAM‐CMT

Fatigue Resistance Assessment of WAAM Carbon Steel

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