Enhanced dispersoid precipitation and dispersion strengthening in an Al alloy by microalloying with Cd

Qian, Feng; Jin, Shenbao; Sha, Gang; Li, Yanjun

doi:10.1016/j.actamat.2018.07.001

Cited by 99 publications

(36 citation statements)

References 58 publications

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“…The characteristics of the β” precipitates (e.g., average volume (

), number density (

), and volume fraction (

)) were quantified with the method in [ 22 ]. Moreover, the dispersoids were quantitatively characterized based on their average diameter (

), number density (

), and volume fraction (

), which were determined according to the methodology provided in [ 23 ].…”

Section: Methodsmentioning

confidence: 99%

Improving the Mechanical Response of Al–Mg–Si 6082 Structural Alloys during High-Temperature Exposure through Dispersoid Strengthening

et al. 2020

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The feasibility and efficacy of improving the mechanical response of Al–Mg–Si 6082 structural alloys during high temperature exposure through the incorporation of a high number of α-dispersoids in the aluminum matrix were investigated. The mechanical response of the alloys was characterized based on the instantaneous high-temperature and residual room-temperature strengths during and after isothermal exposure at various temperatures and durations. When exposed to 200 °C, the yield strength (YS) of the alloys was largely governed by β” precipitates. At 300 °C, β” transformed into coarse β’, thereby leading to the degradation of the instantaneous and residual YSs of the alloys. The strength improvement by the fine and dense dispersoids became evident owing to their complementary strengthening effect. At higher exposure temperatures (350–450 °C), the further improvement of the mechanical response became much more pronounced for the alloy containing fine and dense dispersoids. Its instantaneous YS was improved by 150–180% relative to the base alloy free of dispersoids, and the residual YS was raised by 140% after being exposed to 400–450 °C for 2 h. The results demonstrate that introducing thermally stable dispersoids is a cost-effective and promising approach for improving the mechanical response of aluminum structures during high temperature exposure.

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“…The characteristics of the β” precipitates (e.g., average volume (

), number density (

), and volume fraction (

)) were quantified with the method in [ 22 ]. Moreover, the dispersoids were quantitatively characterized based on their average diameter (

), number density (

), and volume fraction (

), which were determined according to the methodology provided in [ 23 ].…”

Section: Methodsmentioning

confidence: 99%

Improving the Mechanical Response of Al–Mg–Si 6082 Structural Alloys during High-Temperature Exposure through Dispersoid Strengthening

et al. 2020

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“…A range of microalloying elements were demonstrated to enhance strength, fatigue, and creep resistance of aluminum alloys. This includes small additions of the transition metals Sc [ 154 ], Zr [ 155 ], Cd [ 156 ], Nb [ 157 ], Ti [ 158 ] and the rare-earth elements Ce [ 159 ], Hf [ 160 ], Yb [ 161 ], and Er [ 162 ]. Scandium and zirconium were of particular interest due to their grain refining effect.…”

Section: Aluminum Alloys For Waammentioning

confidence: 99%

Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

et al. 2021

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Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low investment and operational expenses, WAAM is well-suited for implementation in a range of industries. The process nature involves fusion melting of a feedstock wire by an electric arc where metal droplets are strategically deposited in a layer-by-layer fashion to create the final shape. The inherent fusion and solidification characteristics in WAAM are governing several aspects of the final material, herein process-related defects such as porosity and cracking, microstructure, properties, and performance. Coupled to all mentioned aspects is the alloy composition, which at present is highly restricted for WAAM of aluminum but received considerable attention in later years. This review article describes common quality issues related to WAAM of aluminum, i.e., porosity, residual stresses, and cracking. Measures to combat these challenges are further outlined, with special attention to the alloy composition. The state-of-the-art of aluminum alloy selection and measures to further enhance the performance of aluminum WAAM materials are presented. Strategies for further development of new alloys are discussed, with attention on the importance of reducing crack susceptibility and grain refinement.

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“…Nevertheless, the current efficiency of the Al–Zn–In alloy still needs further improvement and the corrosion products on the surface are not easy to scrape off after long‐term use . It has been reported that elements such as Sn, Si, Cd can promote the activation dissolution of the aluminum anode and make the anode potential more negative . According to the above discussion, developing quaternary alloys based on the Al–Zn–In alloy is of great help to improve the performance of aluminum sacrificial anodes.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sn, Cd, and Si addition on the electrochemical performance of Al–Zn–In sacrificial anodes

Xia

Zhang

Yang

et al. 2019

Materials & Corrosion

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Overcoming the reduction of current efficiency and stacking of corrosion products on the surface of Al–Zn–In sacrificial anodes after long‐term use is of great significance for Al–Zn–In alloy as an anode material for cathodic protection of steel structures in seawater. In this study, four different sacrificial anode materials were prepared based on the Al‐6Zn‐0.03In (wt%) alloy without and with the addition of alloying elements of Sn, Cd, and Si, respectively. The influence of the addition of Sn, Cd, and Si on the microstructure and electrochemical performance of the Al–Zn–In anode was investigated by optical microscopy and electrochemical measurements. The results show that the introduction of Sn, Cd, and Si changes the microdendrite structure of Al–Zn–In to equiaxed grain. The added Sn, Cd, and Si alloys have more negative and stable working potential and uniformly dissolved morphology. The actual capacity and current efficiency of aluminum alloys increase from 2,000.6 Ah/kg and 70.7% of Al–Zn–In alloy to 2,539.4 Ah/kg and 88.6% of Al–Zn–In–Sn, 2,437.3 Ah/kg and 85.5% of Al–Zn–In–Cd and 2,500.4 Ah/kg and 88.8% of Al–Zn–In–Si alloys, respectively.

show abstract

Enhanced dispersoid precipitation and dispersion strengthening in an Al alloy by microalloying with Cd

Cited by 99 publications

References 58 publications

Improving the Mechanical Response of Al–Mg–Si 6082 Structural Alloys during High-Temperature Exposure through Dispersoid Strengthening

Improving the Mechanical Response of Al–Mg–Si 6082 Structural Alloys during High-Temperature Exposure through Dispersoid Strengthening

Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

Influence of Sn, Cd, and Si addition on the electrochemical performance of Al–Zn–In sacrificial anodes

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