An investigation of the tensile deformation mechanism of a high-oxygen Ti2448 alloy fabricated by powder metallurgy by use of the in-situ EBSD method

Li，Xia1; Wang，Jinhui2; Ye，Shulong1; Zhou，Yinghao1; Yu，Peng1

2021-11-02

10.1016/j.msea.2021.141981

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

0921-5093

Ti2448 alloy fabricated by powder metallurgy using elemental powders of Ti, Nb, Zr and Sn exhibits good ductility but a high content of oxygen, and very limited work hardening in the tensile test. Its deformation mechanism is investigated by in-situ EBSD test conducted in an SEM equipped with a dynamic tensile stage. The results indicate that both dislocation slide and stress-induced phase transformation contribute to the plastic deformation of the alloy. Subsequent to yielding (after 3% of strain), β phase grains with preferential orientation 113//X-axis tend to be transformed into α" martensite phase, which significantly reduces the plastic deformation caused by the dislocation slide and therefore leads to low work hardening.

Deformation mechanism Martensite transformation Powder metallurgy Titanium alloy Work hardening

SCI ; EI

英语

第一 ; 通讯

WOS:000704171300001

20213910964360

Fabrication ; Martensite ; Plastic deformation ; Powder metallurgy ; Tensile testing ; Titanium alloys

Metallography:531.2 ; Heat Treatment Processes:537.1 ; Titanium and Alloys:542.3

MATERIALS SCIENCE

2-s2.0-85115893780

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

Li，Xia,Wang，Jinhui,Ye，Shulong,et al. An investigation of the tensile deformation mechanism of a high-oxygen Ti2448 alloy fabricated by powder metallurgy by use of the in-situ EBSD method[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,828.

Li，Xia,Wang，Jinhui,Ye，Shulong,Zhou，Yinghao,&Yu，Peng.(2021).An investigation of the tensile deformation mechanism of a high-oxygen Ti2448 alloy fabricated by powder metallurgy by use of the in-situ EBSD method.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,828.

Li，Xia,et al."An investigation of the tensile deformation mechanism of a high-oxygen Ti2448 alloy fabricated by powder metallurgy by use of the in-situ EBSD method".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 828(2021).