Tool wear and its effect on microstructure and properties of friction stir processed Ti–6Al–4V

Wu, L.H.; Wang, D.; Xiao, B.L.; Ma, Z.Y.

doi:10.1016/j.matchemphys.2014.04.002

Cited by 48 publications

(22 citation statements)

References 35 publications

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“…In other words, it is harsh and complex to control the nugget temperature to be just near the β transus by adjusting the FSW process. Actually, a fully lamellar microstructure was usually obtained in the nugget under most of FSW parameters [18][19][20]. Therefore, it is of great significance to study whether it is possible to obtain similar superplastic deformation ability for the lamella-structured nugget and the BM.…”

mentioning

confidence: 99%

Achieving superior low-temperature superplasticity for lamellar microstructure in nugget of a friction stir welded Ti-6Al-4V joint

Xue

Xiao

et al. 2016

Scripta Materialia

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mentioning

confidence: 99%

Achieving superior low-temperature superplasticity for lamellar microstructure in nugget of a friction stir welded Ti-6Al-4V joint

Xue

Xiao

et al. 2016

Scripta Materialia

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“…Friction stir welding (FSW), a solid-state joining technique, was originally invented to weld Al alloys [6], and recently applied into Ti alloys due to its advantages over fusion welding [7][8][9][10][11][12][13]. It was reported that the efficiency of FSW Ti alloy joints could be over 90% [14].…”

Section: Introductionmentioning

confidence: 99%

“…Actually, for two-phase Ti alloys, welding temperature exceeded the β transus temperature under the majority of FSW parameters, resulting in a fully lamellar microstructure in the NZ [4,9]. Recently, the present authors [18,19] investigated the superplastic behavior of the NZ with a fine lamellar microstructure in a FSW Ti-6Al-4V joint.…”

Section: Introductionmentioning

confidence: 99%

Achieving superior low temperature and high strain rate superplasticity in submerged friction stir welded Ti-6AI-4V alloy

Zhang

Zeng

et al. 2017

Sci. China Mater.

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The superplastic forming of Ti alloy welds has great application prospects in producing integrated components. However, the nugget zone (NZ) of the Ti alloy welds, produced by fusion welding or conventional friction stir welding (FSW), consists of lamellar microstructure, which exhibits either low superplasticity or high superplastic temperautre and low strain rate. As a result, the NZ plays a leading role in hindering the superplastic forming of the whole welds. In this study, submerged friction stir welding (SFSW) was conducted in Ti-6Al-4V alloy for the first time, and a defectfree weld with the NZ consisting of a strip microstructure was obtained. The NZ exhibited a low-temperature superplasticity at 600°C, which was the lowest superplastic temperature ever reported in the Ti alloy welds. Besides, at 800°C, the NZ showed high strain rate (3×10 −2 s −1 ) superplasticity and a largest elongation of 615% at 1×10 −3 s −1 . Compared to conventional FSW joints, the NZ of SFSW joint exhibited a much lower flow stress and a decrease in optimal superplastic temperature by 100°C. This is mainly attributed to the easy globularization of the strip microstructure, enhancing the ability of grain/phase boundary sliding.

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“…Wu et al 6 studied the tool wear and its effect on the properties of friction stir processed TC4. It was found that serious tool wear happened at 1200 r/min, which led to an increment in hardness and tensile strength, but a loss of ductility of the stir zone.…”

Section: Introductionmentioning

confidence: 99%

Tool wear in disk milling grooving of titanium alloy

Xin

Shi

Ning

2016

Advances in Mechanical Engineering

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The work efficiency of grooving machining can be improved by the approach of disk milling. However, the problem of tool wear was serious because of big milling force and high milling temperature in manufacture process, by which the tool life and the machined surface quality were influenced. In this study, disk-milling grooving experiments of titanium alloy were designed and conducted. First, milling force and milling temperature were examined, which provided theory basis to tool wear. Then, the tool life, wear patterns, and its corresponding mechanisms were investigated in detail through scanning electron microscope observation, X-ray energy-dispersive spectrometer, and automatic tool analyzer. By analyzing experimental results, it was found that, for an example of five-stage compressor blisk of a certain type aircraft engine, disk cutter can only remove about 50 tunnels' volume after five times grinding before wear-out failure, the tool life still needs to be greatly enhanced. The damage morphologies were delamination, thermal fatigue crack, plastic deformation, and tipping. Wear mechanisms were the synergistic interaction among adhesion wear, oxidation wear, and diffusion wear. Thermal crack and tipping were easily found for the cutting edges around the keyway. The oxidation degree of major cutting edge was higher than minor cutting edge; rake face was severe compared to flank face. The element W easily diffused into the titanium alloy, the diffusion ability of Co and C were weaker than W, and the element Ti was dead in diffusion process.

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Tool wear and its effect on microstructure and properties of friction stir processed Ti–6Al–4V

Cited by 48 publications

References 35 publications

Achieving superior low-temperature superplasticity for lamellar microstructure in nugget of a friction stir welded Ti-6Al-4V joint

Achieving superior low-temperature superplasticity for lamellar microstructure in nugget of a friction stir welded Ti-6Al-4V joint

Achieving superior low temperature and high strain rate superplasticity in submerged friction stir welded Ti-6AI-4V alloy

Tool wear in disk milling grooving of titanium alloy

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