Mechanisms of heat treatment and ductility improvement of high-oxygen Ti–6Al–4V alloy fabricated by metal injection molding

Bian，Tieyuan1; Ding，Chao1; Yao，Xiyu1; Wang，Jinhui2; Mo，Wei3; Wang，Ziming4; Yu，Peng1,3; Ye，Shulong1

2022-04-18

10.1016/j.msea.2022.142924

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

Ti–6Al–4V alloy samples with 4000 ppm oxygen are fabricated by metal injection molding. The samples are subjected to a heat-treatment, in which the samples are solution-treated below the β transus and subsequently water-quenched. The tensile tests on the samples indicate that the plastic elongation of the alloy is successfully improved from 1.0 to 3.2% by the heat-treatment. Investigation on the microstructural evolution in the heat-treatment shows that an acicular α phase, existing in the β lamellar structure of the as-sintered samples and harmful for its ductility, is suppressed by quenching and effectively eliminated from the heat-treated samples. Moreover, in the solution treatment, the alloy splits into a primary α phase and a β phase. In the water quenching, the β phase is transformed into a lamellar structure of secondary α phase and β phase with improved ductility. As a result, the improved ductility of the heat-treated samples derives from the plastic deformation of the ductile lamellar structures and the synergic displacement of the rigid primary α phase.

Ductility Heat treatment High oxygen Ti-6Al–4V

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[52104362] ; China Postdoctoral Science Foundation[2021M691401] ; National Key Research and Development Program of China[2021YFB3701900]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000781043100001

ELSEVIER SCIENCE SA

20221011768971

Fabrication ; Injection molding ; Lamellar structures ; Metal testing ; Metals ; Oxygen ; Quenching ; Tensile testing

Heat Treatment Processes:537.1 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85125841409

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Qinghai Provincial Key Laboratory of New Light Alloys,Qinghai Provincial Engineering Research Center of High-Performance Light Metal Alloys and Forming,Qinghai University,Xining,810016,China
3.Shenzhen ElementPlus Material Technology Co. Ltd,Shenzhen,518107,China
4.Department of Materials Science and Engineering,Northwestern University,Evanston,60208,United States

Bian，Tieyuan,Ding，Chao,Yao，Xiyu,等. Mechanisms of heat treatment and ductility improvement of high-oxygen Ti–6Al–4V alloy fabricated by metal injection molding[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,840.

Bian，Tieyuan.,Ding，Chao.,Yao，Xiyu.,Wang，Jinhui.,Mo，Wei.,...&Ye，Shulong.(2022).Mechanisms of heat treatment and ductility improvement of high-oxygen Ti–6Al–4V alloy fabricated by metal injection molding.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,840.

Bian，Tieyuan,et al."Mechanisms of heat treatment and ductility improvement of high-oxygen Ti–6Al–4V alloy fabricated by metal injection molding".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 840(2022).