Nano-treating promoted solute dissolution for novel high strength Al-Cu-Mg alloys

Yuan，Jie1,2; Liu，Qian3; Pan，Shuaihang2; Li，Jiaxing3; Murali，Narayanan1,2; Wang，Shuai3; Li，Xiaochun1,2

2022-08-01

10.1016/j.mtla.2022.101466

Materialia   影响因子和分区

2589-1529

2589-1529

High-strength Al-Cu-Mg alloys are normally designed with a low Mg content because of their tendency towards solidification cracking and a limited solubility of Cu when the Mg content exceeds 2 wt.%. Nano-treating is an emerging metallurgical method to improve the manufacturability and properties of alloys by adding a small volume fraction of ceramic nanoparticles. In this study, approximately 1.0 vol.% of TiC nanoparticles was added to cast Al-4.6Cu-xMg-0.3Mn alloys with a high Mg content ranging from 1.5 wt.% to 4.0 wt.%. Nanoparticles not only eliminated shrinkage porosities during casting but also significantly improved the dissolution of secondary phases during solution treatment of the alloys. Moreover, it was discovered that TiC nanoparticles promoted an unusual solute dissolution behavior to break the thermodynamic solubility limit of Mg in the Al-4.6Cu-xMg-0.3Mn system to achieve high mechanical performance. Theoretical analysis and TEM suggest that the promoted solute dissolution was driven by an overall reduction in interfacial energy between nanoparticles and the S phase during solutionization. The density of primary S’ precipitates was significantly increased by nano-treating, as an unusually high supersaturation was achieved in the nano-treated samples.

Al-Cu-Mg alloy Nano-treating Precipitation Solubility limit Solution treatment TiC nanoparticles

ESCI ; EI

英语

其他

Materials Science

Materials Science, Multidisciplinary

WOS:000814701000003

ELSEVIER SCI LTD

20222612271736

Aluminum alloys ; Copper alloys ; Dissolution ; High strength alloys ; Magnesium alloys ; Nanoparticles ; Ternary alloys ; Titanium alloys

Metallurgy:531.1 ; Aluminum Alloys:541.2 ; Magnesium and Alloys:542.2 ; Titanium and Alloys:542.3 ; Copper Alloys:544.2 ; Alkaline Earth Metals:549.2 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Solid State Physics:933

2-s2.0-85132573263

Scopus

1.Department of Materials Science and Engineering,University of California Los Angeles,California,90095,United States
2.Department of Mechanical and Aerospace Engineering,University of California Los Angeles,California,90094,United States
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Yuan，Jie,Liu，Qian,Pan，Shuaihang,et al. Nano-treating promoted solute dissolution for novel high strength Al-Cu-Mg alloys[J]. Materialia,2022,24.

Yuan，Jie.,Liu，Qian.,Pan，Shuaihang.,Li，Jiaxing.,Murali，Narayanan.,...&Li，Xiaochun.(2022).Nano-treating promoted solute dissolution for novel high strength Al-Cu-Mg alloys.Materialia,24.

Yuan，Jie,et al."Nano-treating promoted solute dissolution for novel high strength Al-Cu-Mg alloys".Materialia 24(2022).