Fabrication of Ti3Al-Based Intermetallic Alloy by Laser Powder Bed Fusion Using a Powder Mixture

被引：1

作者：

Li, Kuanhe ^{[1
,4
]}

Wang, Xianglong ^{[2
,3
,4
]}

Chen, Haishao ^{[5
]}

Huang, Xiaoxiao ^{[5
]}

Zhu, Guanglin ^{[1
]}

Tu, Ganfeng ^{[1
]}

机构：

[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China

[2] China Machinery Inst Adv Mat Co Ltd, Zhengzhou 450001, Peoples R China

[3] China Acad Machinery Sci & Technol, State Key Lab Adv Forming Technol & Equipment, Beijing 100083, Peoples R China

[4] McGill Univ, Min & Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada

[5] Wenzhou Univ Technol, Sch Intelligent Mfg & Elect Engn, Wenzhou 325025, Peoples R China

来源：

MATERIALS | 2023年 / 16卷 / 07期

关键词：

laser powder bed fusion; additive manufacturing; Ti3Al alloy; intermetallic alloy; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; HEAT-TREATMENT; ALPHA-PHASE; TIAL ALLOYS; MICROSTRUCTURE; BETA; EVOLUTION; TI-48AL-2CR-2NB; DEFORMATION;

D O I：

10.3390/ma16072699

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Due to their light weight and outstanding mechanical properties at high temperatures, Ti3Al-based intermetallic alloys have driven increasing interest from both academia and industry; however, when additive manufacturing (AM) is applied to them, the outcome is hardly satisfying. In this work, we report a crack-free Ti3Al-based alloy fabrication by laser powder bed fusion (LPBF) using a mixture of a commercial Ti-48Al-2Cr-2Nb powder and a pure Ti powder. With the aid of a high cooling rate during LPBF, the as-built sample shows a ductile beta phase with some partially-melted particles. After the heat treatment, partially-melted particles were dissolved, and the sample showed equiaxed alpha(2) precipitates in the beta matrix. The hardness was 515 +/- 38 HV in the as-built sample and 475 +/- 37 HV in the heat-treated sample. This study shows a novel strategy to fabricate crack-free Ti3Al-based alloy using LPBF from powder blends.

引用

页数：16

共 58 条

[21]

Froes F.H., 1996, PHYS METALLURGY PROC, P297, DOI DOI 10.1007/978-1-4613-1215-4_8

[22] Effect of boundary on the alpha phase precipitation in a near-alpha titanium alloy [J].

Gao, Xiongxiong ;

Zeng, Weidong ;

Li, Xin ;

Zhou, Dadi ;

Xu, Jianwei ;

Wang, Qingjiang .

MATERIALS LETTERS, 2018, 233 :298-301

[23] STRUCTURE, TENSILE DEFORMATION, AND FRACTURE OF A TI3AL-NB ALLOY [J].

GOGIA, AK ;

BANERJEE, D ;

NANDY, TK .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (03) :609-625

[24] In-situ synthesis of Ti2A1Nb-based intermetallic alloy by selective laser melting [J].

Grigoriev, Alexey ;

Polozov, Igor ;

Sufiiarov, Vadim ;

Popovich, Anatoly .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 704 :434-442

[25] Design for additive manufacturing of composite materials and potential alloys: a review [J].

Hegab, Hussien A. .

MANUFACTURING REVIEW, 2016, 3

[26] Effect of fiber coating on the fatigue crack initiation and multiplication of unnotched SCS-6/Ti3Al composites [J].

Her, YC ;

Yang, JM ;

Wang, PC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 259 (02) :201-208

[27] Interplay between effect of Mo and chemical disorder on the stability of β/βo-TiAl phase [J].

Holec, David ;

Legut, Domink ;

Isaeva, Leyla ;

Souvatzis, Petros ;

Clemens, Helmut ;

Mayer, Svea .

INTERMETALLICS, 2015, 61 :85-90

[28]

Kaufman M.J., 1988, PHASE RELATIONS TI3A

[29] Microstructure and phase relations in a powder-processed Ti-22Al-12Nb alloy [J].

Kumar, SG ;

Reddy, RG .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (04) :1121-1126

[30] Mitigating cracking in laser powder bed fusion of Ti-48Al-2Cr-2Nb via introducing massive β phase [J].

Li, Kuanhe ;

Wang, Xianglong ;

Brodusch, Nicolas ;

Tu, Ganfeng .

MATERIALS CHARACTERIZATION, 2023, 196

← 1 2 3 4 5 6 →