Microstructures and microhardness for sheets and TIG welded joints of TA15 alloy using friction stir spot processing

Yang, Xiawei; Li, Wenya; Li, Hongyu; Yao, Shuotian; Sun, Yixuan; Sun, Yi-xian; Mei, Lu

doi:10.1016/s1003-6326(18)64638-2

Cited by 13 publications

(3 citation statements)

References 16 publications

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“…Thus, the surface microhardness of aircraft structural components is particularly relevant, given their influence on the bearing capacity and the wear resistance of these elements [22,23]. In this sense, the cutting parameters are some of the most important machining input variables to keep in mind regarding this output variable.…”

Section: Introductionmentioning

confidence: 99%

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

et al. 2020

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In this work, an analysis of the cutting speed and feed influence on surface roughness and microhardness of UNS A97075-T6 alloy, turned under dry conditions, was carried out. The results were compared before and after a corrosion process. The influence of these cutting parameters on each of these variables was analyzed, as well as the possible interrelation between them. The microgeometrical deviations showed a general trend to increase with feed. However, no significant modifications were observed as a function of the cutting speed. This trend was softer after the corrosion process, due to the surface alterations produced by pitting corrosion, which resulted in higher dispersion of the experimental data. In addition, a surface microhardness increment was observed in all samples, after machining and before corrosion, regardless of the cutting parameter values. The experimental results revealed that the mechanical effects, produced by the feed, should not be neglected against the thermal effects, produced by the cutting speed, within the range of the tested cutting speed. Finally, the corrosion process negatively affected the microhardness, but it was not possible to establish a direct relationship between the cutting parameters, surface roughness, and microhardness after a corrosion process.

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Section: Introductionmentioning

confidence: 99%

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

et al. 2020

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“…There are many post-treatments that one can employ in enhancing the joint. This includes hightemperature and solid-state-based treatments like friction stir processing [5][6][7]. Friction Stir Processing (FSP) is a solid statebased microstructural modifying technique that uses friction to generate the heat required to soften the material for microstructural modification [8].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Influence of Microstructure on the Mechanical Properties of TIG Welded Joints processed by Friction Stir considering the sampling Orientation

Msomi,

Mabuwa

2024

Eng. Technol. Appl. Sci. Res.

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The contribution of the microstructural arrangement to the mechanical properties of friction stir processed Tungsten Inert Gas (TIG) welded joints is reported in this work. The TIG-welded joints were subjected to a single pass of Friction Stir Processing (FSP). The friction stir processed joint was sampled transversally and longitudinally, and different tests were conducted and studied comparatively. The microstructural analysis showed refined grains with varying degrees. The mean grain size for the transversally sampled specimen was found to be 11.48 µm, while the longitudinally sampled specimen had varying mean grain size from 7.32 µm to 15.09 µm. The varying mean grain size of the longitudinally sampled specimen is caused by the staggered arrangement of the microstructure. The tensile properties and the microhardness of the transversally sampled specimen were lower than those of the longitudinally sampled specimen. The ultimate tensile strength of the transversally sampled specimen was found to be 87.88 MPa which is lower than that of the longitudinally sampled specimen (133.83 MPa). The microhardness of the longitudinally sampled specimen fluctuated between 30 HV and 80 HV while the transversally sampled specimen had a maximum microhardness of approximately 57 HV.

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“…In addition, the heat treatment on 5-series and 4-series aluminium alloys couldn't obtain good strengthening effect. In the last few years, FSP has been considered as a feasible way to elevate the mechanical properties of TIG welded TA15 joints [16] and a low-cost technique for fusion welds repair and modification in AA6061 alloys [17]. Under the circumstances, it is attempted to improve the mechanical properties of TIG cladding layer by applying FSP to it.…”

Section: Introductionmentioning

confidence: 99%

Effect of friction stir processing on microstructures and mechanical properties of TIG cladding layer on AA7075

Chen

Liu

Zhu

2021

Mater. Res. Express

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AA7075 is a precipitation strengthened Al-Zn-Mg-Cu alloy which has been widely used. As a common way to repair AA7075 components, tungsten inert gas (TIG) cladding generates coarse grains and defects. In addition, the use of other types of filler wires could lead to insufficient rigidity and strength of the cladding layer. In the present work, friction stir processing (FSP) has been applied to the TIG cladding layer on AA7075 to study the effect of process parameters on microstructures and mechanical properties. The macro/micro structural characteristics, elemental distribution, microhardness distribution and tensile properties have been investigated. The macroscopic defects in TIG cladding layer are eliminated and the size of grains is decreases to around 6 μm by FSP. FSP reduces the compositional difference between the stir zone and the base material. Higher rotational speed promotes the grain refinement while the lower traverse speed benefits the microstructural uniformity. FSP on the TIG weld bead brings improvement in tensile properties and hardness. All the fractures for TIG+FSP samples occur at thermo-mechanically affected zone of the advancing side. The tensile strength of the stir zone increases from 424.2 to 442.8 MPa with the increase in rotational speed and traverse speed.

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Microstructures and microhardness for sheets and TIG welded joints of TA15 alloy using friction stir spot processing

Cited by 13 publications

References 16 publications

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

Analyzing the Influence of Microstructure on the Mechanical Properties of TIG Welded Joints processed by Friction Stir considering the sampling Orientation

Effect of friction stir processing on microstructures and mechanical properties of TIG cladding layer on AA7075

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