Flat hardness distribution in AA6061 joints by linear friction welding

Choi, Jeong-Won; Li, Weihao; Ushioda, Kohsaku; Fujii, Hidetoshi

doi:10.1038/s41598-021-91249-5

Cited by 20 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The softening in Al joints can be suppressed by exploiting its rapid heating and cooling, a large introduced shear strain and a controlled temperature by optimum applied pressure [10][11][12]. Recently, it has been demonstrated that the high applied pressure is a promising method to perform LFW at a low temperature [13]. Furthermore, this process can increase productivity due to its extremely rapid process.…”

Section: Introductionmentioning

confidence: 99%

Effect of applied pressure on microstructure and mechanical properties of linear friction welded AA1050-H24 and AA5052-H34 joints

Choi

Ushioda

et al. 2021

Science and Technology of Welding and Joining

Self Cite

View full text Add to dashboard Cite

Linear friction welding (LFW) of AA1050 and AA5052 was performed at various applied pressures. The strengthening contributions of the joints were examined to investigate the relationship between the microstructure and mechanical properties. The dominant strengthening mechanisms at the weld centre of the AA1050 joint were both the grain-boundary strengthening and dislocation strengthening. While the weld centre in the AA5052 joint was dominated by the grain-boundary strengthening since the dynamic recrystallisation (DRX) during LFW was promoted due to the relatively low stacking fault energy (SFE). On the other hand, the strengthening mechanism in the regions away from the weld centre in the AA1050 and AA5052 joints was mainly dominated by the dislocation strengthening due to increased dislocation introduced during LFW.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of applied pressure on microstructure and mechanical properties of linear friction welded AA1050-H24 and AA5052-H34 joints

Choi

Ushioda

et al. 2021

Science and Technology of Welding and Joining

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure 13 shows the maximum temperature during the welding processes measured using an infrared camera. As previous studied reported, [30][31][32][33][34][35] the welding temperature of both the Fe and Al sides was found to decrease with increasing applied pressure. On the other hand, the reduction in the welding temperature was relatively slight on the Al side, because of significant heat transfer from Fe side, which was elevated to a temperature above 1 000°C under all pressure conditions.…”

Section: Effect Of the Applied Pressurementioning

confidence: 57%

A Sound Dissimilar AA5052/S45C Joint Formed by Uniform and Simultaneous Deformation of Both Materials Using Pressure-controlled Joule Heat Forge Welding

et al. 2022

Self Cite

View full text Add to dashboard Cite

The effect of weld parameters on the microstructure and mechanical properties of AA5052/S45C dissimilar joints fabricated by a novel pressure-controlled joule heat forge welding (PJFW) was systematically investigated. The deformation behaviors of the materials during the welding process were able to be controlled by regulating the electrical resistance which affects the heating rate. Since the welding temperature decreased with the increasing applied pressure, the formation of the intermetallic compounds layer at the weld interface was suppressed. Thus, a peak joint efficiency of 85% was reached by applying a high pressure of 180 MPa.

show abstract

“…It can be seen from Figure 7 that the hardness of AA 5052 was only 85 HV [36], while the hardness of the anodic coating was 115 HV. After the anodic coating was treated by hydro-thermal technology, the hardness of the coating increased.…”

Section: Hardnessmentioning

confidence: 98%

Improving the Anti-Corrosion and Anti-Wear Performance of Anodic Coating on the Surface of AA 5052 via Hydro-Thermal Treatment

2022

View full text Add to dashboard Cite

Hydro-thermal technology had been used to improve the anti-corrosion and anti-wear performance of anodizing coating on the surface of aluminium alloys. The micromorphology of the coating has been studied by SEM and results proved the coating had a compact structure. The element in the substrate had been characterized by EDS and results proved Fe had redissolved to the Al substrate. The crystalline structure of the coating had been studied by XRD and results proved the anodic coating could be transformed into η-, p- and γ-alumina. The electrochemical properties had been researched using an electrochemical workstation; results proved after the coating had been treated by hydro-thermal technology, its anti-corrosion properties could be improved. At the hydro-thermal temperature of 400 ℃, its open circuit voltage and impedance reached −0.46 V and 160 kΩ × cm2, respectively. The hardness of the coating had to be measured with an HVS-100 micro-hardness tester, with results proving that, after the hydro-thermal treatment, the hardness of the coating increased to 150 HV. The friction coefficient of the coating had been studied using a ball-on-disk tester, and the results proved it decreased to 0.46. The MMW-2 scratch tester had been used to measure the adhesion between the coating and substrate; results proved the coating had better adhesion with the substrate. The thermal conductivity of the coating had been studied by a heat conduction coefficient measurement device; results proved that it reached 11.2 W/m × K at a hydro-thermal temperature of 400 ℃, far higher than that of organic coating.

show abstract

Flat hardness distribution in AA6061 joints by linear friction welding

Cited by 20 publications

References 30 publications

Effect of applied pressure on microstructure and mechanical properties of linear friction welded AA1050-H24 and AA5052-H34 joints

Effect of applied pressure on microstructure and mechanical properties of linear friction welded AA1050-H24 and AA5052-H34 joints

A Sound Dissimilar AA5052/S45C Joint Formed by Uniform and Simultaneous Deformation of Both Materials Using Pressure-controlled Joule Heat Forge Welding

Improving the Anti-Corrosion and Anti-Wear Performance of Anodic Coating on the Surface of AA 5052 via Hydro-Thermal Treatment

Contact Info

Product

Resources

About