Characterization of microstructure, mechanical properties and formability for thermomechanical treatment of friction stir welded 2024-O alloys

Pang, Qiu; Zhang, J.H.; Huq, Mohammad Jobayer; Hu, Zhili

doi:10.1016/j.msea.2019.138303

Cited by 29 publications

(15 citation statements)

References 31 publications

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“…This undesirable phenomenon occurs during post-weld heat treatment and involves catastrophic growth of a few grains which finally consume almost entire weld zone. It has been observed in various aluminum alloys including 1 xxx [3][4][5][6], 2 xxx [7][8][9][10][11][12][13][14][15][16], 5 xxx [17][18][19][20][21][22][23][24][25][26][27][28][29], 6 xxx [30][31][32][33], and 7 xxx [11,[34][35][36][37][38][39][40][41] series, as well as in magnesium alloys [42][43][44][45], some steels [46][47][48][49], and even metal-matrix composites [50,…”

Section: Introductionmentioning

confidence: 99%

“…Within the stir zone, the abnormal microstructural coarsening typically initiates either at the upper weld surface or at the weld root [4,8,9,15,17,[19][20][21][25][26][27]31,[34][35][36]38,40,41,43,45,48,52,53]. Also, the grain growth at the advancing side (AS) is often more pronounced than that at the retreating side (RS) [8,25,27,30,36,38,43,48,52].…”

Section: Introductionmentioning

confidence: 99%

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Relationship between welding conditions, abnormal grain growth and mechanical performance in friction-stir welded 6061-T6 aluminum alloy

Kalinenko

Высоцкий

Malopheyev

et al. 2021

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relationship between welding conditions, abnormal grain growth and mechanical performance in friction-stir welded 6061-T6 aluminum alloy

Kalinenko

Высоцкий

Malopheyev

et al. 2021

Materials Science and Engineering: A

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“…The needle-like β′′ precipitated phase obtained by the original T6 treatment becomes larger, and the strengthening effect decreases. The main strengthening mechanism of aluminum alloys is precipitation phase strengthening [8,[28][29][30]. As shown in Figure 3, in the dark field of SEM, the number of precipitated phases at three different temperatures is reduced compared with the T6 sample: The higher the temperature, the more the number decreases.…”

Section: Resultsmentioning

confidence: 97%

Investigation on Compressive Formability and Microstructure Evolution of 6082-T6 Aluminum Alloy

Zhao

et al. 2020

Metals

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The 6xxx aluminum alloy is the first choice for automotive lightweight forgings due to its excellent performance, high strength and low weight. The production time of current aluminum alloy forging generally exceeds 10 h. To reduce the production time of traditional aluminum alloy forgings, 6082-T6 aluminum alloy is used in the forming process. The effects of different heating temperatures (200 °C, 300 °C, and 400 °C) and deformation degrees (30%, 50%, and 70%) on the deformability and properties of 6082-T6 billets have been investigated. The results show that when the heating temperature is higher than 300 °C, the compressive deformation resistance obviously decreases with increasing strength. With compression at 200 °C and 70% deformation with short heating time, the strength of the sample is close to the T6 (solution treatment and artificial aging) state. A large number of dislocations and subgrains were introduced due to the compression deformation, and their amounts decreased as the heating temperature increased. The size of the precipitated phase β′′ slightly grows under a heating temperature of 200 °C. However, when the heating temperature is higher than 300 °C, the precipitated phase gradually changes from β′′, which is optimal for the strengthening effect, to β′ and β, which offer weaker strengthening. Therefore, under a lower heating temperature of 200 °C for 5 min, a large number of dislocations are introduced with the β′′ precipitated phase, leading to higher strength with less heat treatment time.

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“…Figure 20c suggests that the fracture surface appearance of FSW T6-495 and T6-450 deformed the joint. The same authors also investigated the microstructural stability and mechanical properties of FSW Al-Cu alloys [101]. It was discovered that high heat input and low solution temperature suppressed abnormal grain growth (AGG) during the FSW process because of the difference in grain size.…”

Section: Different Deformation Strategiesmentioning

confidence: 99%

Recent Progress on Regulating Strategies for the Strengthening and Toughening of High-Strength Aluminum Alloys

Zheng

Pang

et al. 2022

Materials

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Due to their high strength, high toughness, and corrosion resistance, high-strength aluminum alloys have attracted great scientific and technological attention in the fields of aerospace, navigation, high-speed railways, and automobiles. However, the fracture toughness and impact toughness of high-strength aluminum alloys decrease when their strength increases. In order to solve the above contradiction, there are currently three main control strategies: adjusting the alloying elements, developing new heat treatment processes, and using different deformation methods. This paper first analyzes the existing problems in the preparation of high-strength aluminum alloys, summarizes the strengthening and toughening mechanisms in high-strength aluminum alloys, and analyzes the feasibility of matching high-strength aluminum alloys in strength and toughness. Then, this paper summarizes the research progress towards adjusting the technology of high-strength aluminum alloys based on theoretical analysis and experimental verification, including the adjustment of process parameters and the resulting mechanical properties, as well as new ideas for research on high-strength aluminum alloys. Finally, the main unsolved problems, challenges, and future research directions for the strengthening and toughening of high-strength aluminum alloys are systematically emphasized. It is expected that this work could provide feasible new ideas for the development of high-strength and high-toughness aluminum alloys with high reliability and long service life.

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Characterization of microstructure, mechanical properties and formability for thermomechanical treatment of friction stir welded 2024-O alloys

Cited by 29 publications

References 31 publications

Relationship between welding conditions, abnormal grain growth and mechanical performance in friction-stir welded 6061-T6 aluminum alloy

Relationship between welding conditions, abnormal grain growth and mechanical performance in friction-stir welded 6061-T6 aluminum alloy

Investigation on Compressive Formability and Microstructure Evolution of 6082-T6 Aluminum Alloy

Recent Progress on Regulating Strategies for the Strengthening and Toughening of High-Strength Aluminum Alloys

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