In situ design of ultrafine-grained 7075 Al alloy with laser powder bed fusion

He, Xi1,2,3; Li, Gan1,2,4; Huang, Yuhe1,2,5; Huang, Zhun1; Wang, Tao3; Li, Xinggang1,2; Zhu, Qiang1,2

2023-08-01

10.1016/j.matlet.2023.134401

MATERIALS LETTERS   影响因子和分区

0167-577X

1873-4979

Laser powder bed fusion (L-PBF) is an advanced fast prototyping method for fabricating high-performance metallic components with complex structures. However, the development of L-PBFed high-strength Al alloys is often limited by the hot cracks. To grapple with this difficult issue, a novel solution was proposed by intro-ducing 3 wt% Ti2AlNb intermetallic (IMC) powders into the 7075 Al powders to form an in-situ nucleated 7075 (IN-7075) Al alloy. The results indicated that the as-printed IN-7075 Al alloy was crack-free, and the grain size has been refined from 72.6 mu m to 1.5 mu m, which was attributed to the in-situ formation of Al3(Ti, Nb) particles and the high grain growth restriction factor (Q) values of Ti and Nb elements in the Al matrix. After a suitable heat treatment, the IN-7075 Al alloy exhibited good mechanical properties with an ultimate tensile strength of 429 +/- 2 MPa and an elongation of 9.8 +/- 0.5%.

Additive manufacturing Laser powder bed fusion Metals and alloys 7075 Al alloy Ti2AlNb intermetallic Grain refinement

SCI ; EI

英语

第一 ; 通讯

National Natural ScienceFoundation of China[52074157] ; Guangdong Basic and Applied Basic Research Foundation[2021A1313110348] ; Shenzhen Science and Technology Program["JCYJ20180305123432756","JCYJ20210324104608023","KQTD20170328154443162"] ; Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials[ZDSYS201703031748354]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000989242700001

ELSEVIER

20231714020545

3D printing ; Cracks ; Grain growth ; Grain refinement ; Grain size and shape ; Heat treatment ; High strength alloys ; Intermetallics ; Niobium alloys ; Powder metals ; Tensile strength ; Ternary alloys ; Titanium alloys

Metallurgy:531.1 ; Heat Treatment Processes:537.1 ; Aluminum Alloys:541.2 ; Titanium and Alloys:542.3 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Printing Equipment:745.1.1 ; Crystal Growth:933.1.2

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Addit Mfg High performance Mat, Shenzhen 518055, Peoples R China
3.Xiangtan Univ, Sch Mech Engn & Mech, Xiangtan 411105, Peoples R China
4.City Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China
5.Univ Sci & Technol Beijing, Inst Carbon Neutral, Beijing 100083, Peoples R China

He, Xi,Li, Gan,Huang, Yuhe,et al. In situ design of ultrafine-grained 7075 Al alloy with laser powder bed fusion[J]. MATERIALS LETTERS,2023,344.

He, Xi.,Li, Gan.,Huang, Yuhe.,Huang, Zhun.,Wang, Tao.,...&Zhu, Qiang.(2023).In situ design of ultrafine-grained 7075 Al alloy with laser powder bed fusion.MATERIALS LETTERS,344.

He, Xi,et al."In situ design of ultrafine-grained 7075 Al alloy with laser powder bed fusion".MATERIALS LETTERS 344(2023).