Effect of Pre- and Post-weld Heat Treatments on Linear Friction Welded Ti-5553

Wanjara, P.; Dalgaard, E.; Gholipour, Javad; Cao, X.; Cuddy, Jonathan; Jonas, John J.

doi:10.1007/s11661-014-2475-y

Cited by 15 publications

(17 citation statements)

References 26 publications

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“…In addition, the 10 µm diameter features observed in the Ti17 side of the WCZ are very similar to the α depleted β distorted grains seen in the WCZ of the similar Ti17 LFW joints characterized by Ballat-Durand et al [15], Dalgaard et al [26] and Wanjara et al [27].…”

Section: Flash Morphology and Weld Microstructure Of The Ground-weldesupporting

confidence: 78%

“…Nonetheless, due to the hot deformation experienced during LFW, Ti17 undergoes a depletion of the α precipitates at the vicinity of the WCZ that induces some softening [15]. A similar depletion was observed for Ti17 and Ti5553 LFW joints [25,26,27], in which failure occurred at the TMAZ, suggesting that this location is a potential mechanically weak zone. The effect of these mechanically weak zones on the strength, fatigue strength and fracture toughness of dissimilar Ti17-Ti64 LFW joints has not previously been studied.…”

Section: Introductionmentioning

confidence: 55%

“…Thermal treatments are largely used after friction welding [60]. For instance, the similar Ti5553 LFW joint studied by Dalgaard et al [26] exhibited failure at the Ti17 TMAZ but after the application of a solution treatment and ageing thermal treatment, Wanjara et al [27] showed that failure no longer occurred at the former Ti17 TMAZ. Similarly, Ballat-Durand et al [15] proposed a standard solution treatment and ageing heat treatment that seems to restore the PM microstructure of a similar Ti17 LFW joint.…”

Section: Failure At the Ti17 Tmaz Of The Ground-welded Lfw Jointmentioning

confidence: 99%

“…The authors observed elongated damage features in the fractographs that were attributed to the brittle fracture at the TMAZ. The same depletion of the α precipitation led to poor mechanical properties of similar Ti5553 LFW joints [26,27]. It seems clear that the depletion of the α precipitates at the WCZ and TMAZ represents a structural weakness for similar Ti17 and Ti5553 LFW joints.…”

Section: Introductionmentioning

confidence: 96%

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Strength, fatigue strength and toughness of dissimilar Ti17–Ti64 linear friction welded joints: Effect of soft surface contamination and depletion of α precipitates

García

Esin

Morgeneyer

2021

Materials Science and Engineering: A

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The effect of microstructure of three dissimilar Ti17-Ti64 linear friction welded joints on the strength, fatigue strength and fracture toughness was studied. A special attention was paid to role of soft contaminants and α precipitate depletion. Three joints were produced: one in the as machined state after electrical discharge machining, one ground prior to welding, and one welded in the as machined state and post-weld heat treated. The microstructure of the weld centre zone (WCZ) exhibited an acicular entangled α martensite with a Widmanstätten morphology on the Ti64 side and fine equiaxed distorted β grains on the Ti17 side. A depletion of the strengthening α precipitates was observed in the WCZ and the thermo-mechanically affected zone (TMAZ) on the Ti17 side. For the studied welding parameters, the LFW selfcleaning mechanism failed to extrude the contaminants in the weld interface of the joint welded in the as machined state. These contaminants were related to prior to welding machining and were denominated soft contaminants due to their relatively low melting point. A defect layer was formed that led to a pseudo-brittle fracture in at the WCZ during tensile testing, cyclic loading and fracture toughness testing. During tensile testing of the joint that was ground prior to welding, failure occurred sometimes at the Ti64 parent material (PM) and sometimes at the Ti17 TMAZ. Fatigue cracks initiated at the latter weak zone with a reduced fatigue strength. Compared to the PM, fracture toughness of samples even without fatigue pre-crack was also reduced. Failure at the weak zone highlighted unexpected colonies of elongated dimples that nucleated on transgranular deformation bands.

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Section: Flash Morphology and Weld Microstructure Of The Ground-weldesupporting

confidence: 78%

Section: Introductionmentioning

confidence: 55%

Section: Failure At the Ti17 Tmaz Of The Ground-welded Lfw Jointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Strength, fatigue strength and toughness of dissimilar Ti17–Ti64 linear friction welded joints: Effect of soft surface contamination and depletion of α precipitates

García

Esin

Morgeneyer

2021

Materials Science and Engineering: A

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“…Previous studies [9][10][11][12][13][14][15][16] report three dissimilar microstructural zones across the weldment, which are the weld zone, the TMAZ and the parent material. Specifically, in the weld zone of alpha-beta (a-b) titanium alloys, exposure to temperatures above the b-transus combined with high strain rates and strains induce the formation of fine recrystallized b grains that transform during rapid cooling after welding to a martensitic-Widmanstätten a microstructure.…”

Section: Introductionmentioning

confidence: 99%

High and low cycle fatigue behavior of linear friction welded Ti–6Al–4V

Stinville

Bridier

Ponsen

et al. 2015

International Journal of Fatigue

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Effect of Pressure on the Linear Friction Welding of a Tool Steel and a Low‐Alloy Carbon Steel

Zambrano,

Gholipour,

Wanjara

et al. 2024

steel research int.

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This study investigates the effect of pressure (burn‐off and forging) on the mechanical properties of the joint between a wear‐resistant tool steel and a low‐alloy steel using linear friction welding. The authors have previously demonstrated the feasibility of joining these dissimilar materials, but the impact of pressure on the mechanical properties of the bimaterial joint remains unclear. To address this, weld samples are prepared using different pressures and are characterized through microstructural analysis, microhardness, tensile testing, and fractography. The results show that the strength of the joint between the wear‐resistant tool steel and the low‐alloy carbon steel increases as the pressure increases up to a certain point, after which a decrease is observed. The highest joint strength is achieved at a pressure of 360 MPa. The microhardness profile measurement reveals a distinct transition zone at the interface between the two materials, with varying hardness values. The hardness of the low‐alloy carbon steel increases near the interface, while that of the wear‐resistant tool steel decreases. This transition zone is found to be narrower at higher pressures. Microstructural characterization shows that the grain structure near the interface differs from that of the starting base materials.

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Effect of Pre- and Post-weld Heat Treatments on Linear Friction Welded Ti-5553

Cited by 15 publications

References 26 publications

Strength, fatigue strength and toughness of dissimilar Ti17–Ti64 linear friction welded joints: Effect of soft surface contamination and depletion of α precipitates

Strength, fatigue strength and toughness of dissimilar Ti17–Ti64 linear friction welded joints: Effect of soft surface contamination and depletion of α precipitates

High and low cycle fatigue behavior of linear friction welded Ti–6Al–4V

Effect of Pressure on the Linear Friction Welding of a Tool Steel and a Low‐Alloy Carbon Steel

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