Study on the microstructure and liquid–solid correlation of Al–Mg alloys

Wang, Mingxu; Jia, Peng; Lv, Dianfei; Geng, Haoran

doi:10.1080/00319104.2015.1121784

Cited by 9 publications

(5 citation statements)

References 20 publications

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“…Reprinted with permission from Ref. [ 20 ]; 2015, Taylor & Francis. ( b ) JMatPro phase evolution for Scalmalloy ® during isothermal heat treatment.…”

Section: Figurementioning

confidence: 99%

Heat Treatments for Minimization of Residual Stresses and Maximization of Tensile Strengths of Scalmalloy® Processed via Directed Energy Deposition

Boillat-Newport,

Isanaka,

Kelley

et al. 2024

Materials

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Scalmalloy® is an Al-Mg-Sc-Zr-based alloy specifically developed for additive manufacturing (AM). This alloy is designed for use with a direct aging treatment, as recommended by the manufacturer, rather than with a multistep treatment, as often seen in conventional manufacturing. Most work with Scalmalloy® is conducted using powder bed rather than powder-fed processes. This investigation seeks to fill this knowledge gap and expand beyond single-step aging to promote an overall balanced AM-fabricated component. For this study, directed energy deposition (DED)-fabricated Scalmalloy® components were subjected to low-temperature treatments to minimize residual stresses inherent in the material due to the layer-by-layer build process. X-ray diffraction (XRD) indicated the possibility of stress minimization while reducing the detriment to mechanical strength through lower temperature treatments. Microstructural analyses consisting of energy dispersion spectroscopy (EDS) and electron backscatter diffraction (EBSD) revealed the presence of grain growth detrimentally affecting the strength and elongation made possible by very small grains inherent to AM and rapid solidification. Tensile testing determined that treatment at 175 °C for 1 h provides the best relief from the existing residual stresses; however, this is accompanied by a diminishment in the yield and tensile strength of 19 and 9.5%, respectively. It is noted that treatment at 175 °C for 2 h did not provide as great of a decrease in residual stresses, theorized to be the result of grain growth and other strengthening mechanisms further stressing the structure; however, the residual stresses are still significantly diminished compared with the as-built condition. Furthermore, a minimal reduction of the tensile strengths indicates the possibility of finding a balance between property diminishment and stress state through the work proposed here.

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“…Reprinted with permission from Ref. [ 20 ]; 2015, Taylor & Francis. ( b ) JMatPro phase evolution for Scalmalloy ® during isothermal heat treatment.…”

Section: Figurementioning

confidence: 99%

Heat Treatments for Minimization of Residual Stresses and Maximization of Tensile Strengths of Scalmalloy® Processed via Directed Energy Deposition

Boillat-Newport,

Isanaka,

Kelley

et al. 2024

Materials

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“…Phase diagrams of (A) Al‐Cu, 106 (B) Al‐Zn, 107 (C) Al‐Mg, 108 and (D) Al‐Mg‐Zn 109 . The thick green line is showing an example, and the narrow green and red lines are showing layer‐by‐layer composition in the solidification process.…”

Section: Rbf Of Am'd Materialsmentioning

confidence: 99%

“…[101][102][103] Assuming that the melt pool is in the melting zone at 680 C and that rapid cooling has taken place, it could be predicted that the final thin layer of the solidified crust will have close to 10% copper (Figure 19A). The F I G U R E 1 9 Phase diagrams of (A) Al-Cu, 106 (B) Al-Zn, 107 (C) Al-Mg, 108 and (D) Al-Mg-Zn. 109 The thick green line is showing an example, and the narrow green and red lines are showing layer-by-layer composition in the solidification process.…”

Section: Aluminum Alloysmentioning

confidence: 99%

A review on isothermal rotating bending fatigue failure: Microstructural and lifetime modeling of wrought and additive manufactured alloys

Behvar

Berto

Haghshenas

2023

Fatigue Fract Eng Mat Struct

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The cumulative effect of many incidents that are brought about by an increase in temperature establishes an environment in which premature failure (including fatigue failure) becomes a challenging issue. Isothermal rotating bending fatigue (IT‐RBF) testing may simulate industrial components' high temperatures and rotating environments. This state‐of‐the‐art review paper covers the current research on IT‐RBF failure in wrought and additive‐manufactured alloys, focusing on microstructural and lifetime models. The article emphasizes the need of using microstructural information in fatigue life models to better represent complex material structure‐failure behavior associations. Additive‐manufactured alloys contain unique microstructural characteristics and processing‐induced defects making fatigue modeling difficult. The paper concludes with implications for industrial fatigue‐resistant alloy development. It emphasizes the necessity for a multidisciplinary approach that integrates materials science, mechanics, and data science to optimize these materials under cyclic loads. The review concludes by proposing future research and innovation in this subject.

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“…Wang M X [19] et al found that there are certain microscopic heterogeneous clusters in the aluminum-magnesium alloy melt, which continuously change with the change of temperature; the greater the cooling rate, the greater the relaxation of the microscopic heterogeneous structure evolution The above performance is that the greater the change in resistivity, the more obvious the hysteresis; the large cooling rate and high pouring temperature help to enhance the structural relaxation during the solidification process, which hinders the reorganization of atomic clusters, thereby forming a uniform, dense and high hardness Solidified tissue.…”

Section: Domestic Research Progressmentioning

confidence: 99%

Recent Progress in Research of Metal Melt Structure

Zhang

Zeng

2022

SSP

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This article reviews the research methods and research progress of metal melt structures at home and abroad in recent years. Through liquid XRD, synchrotron radiation X-ray diffraction experiments, X-ray fine structure absorption spectroscopy, sensitive physical property testing and other experimental methods, as well as computer simulations, a lot of information about the structure of metal melts has been obtained. These studies are liquid-solid The structural transformation, the improvement of alloy structure and performance, and the preparation of amorphous provide theoretical guidance.

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Study on the microstructure and liquid–solid correlation of Al–Mg alloys

Cited by 9 publications

References 20 publications

Heat Treatments for Minimization of Residual Stresses and Maximization of Tensile Strengths of Scalmalloy® Processed via Directed Energy Deposition

Heat Treatments for Minimization of Residual Stresses and Maximization of Tensile Strengths of Scalmalloy® Processed via Directed Energy Deposition

A review on isothermal rotating bending fatigue failure: Microstructural and lifetime modeling of wrought and additive manufactured alloys

Recent Progress in Research of Metal Melt Structure

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