High-speed nanoindentation mapping of a near-alpha titanium alloy made by additive manufacturing

Liu, Zhiying1; Zhang, Jiahui1,3; He, Bei2; Zou, Yu1

2021-04-01

10.1557/s43578-021-00204-7

JOURNAL OF MATERIALS RESEARCH   影响因子和分区

0884-2914

2044-5326

Titanium alloys are widely used in additive manufacturing, but their complex microstructures and related micromechanical properties have not been fully explored. Here, we employ high-speed nanoindentation mapping, electron probe microanalysis, and electron backscatter diffraction to characterize as-deposited and heat-treated Ti-6Al-2Zr-Mo-V alloys. Our results show the correlations between mechanical contrasts (hardness and elastic modulus) and phase contrasts (alpha and beta). The hardness and elastic modulus of the alpha and beta phases are increased due to the element redistribution after annealing (Al diffuses from beta to alpha; Mo and V diffuse from alpha to beta). We use a K-means clustering algorithm to analyze the nanoindentation dataset and correlate the mechanical property maps to the distribution of alpha and beta phases. Our study employs the emerging high-speed nanoindentation mapping to give a better understanding of the microstructure-mechanical property relationship of additive manufactured multiphase alloys across length scales.

Nanoindentation Additive manufacturing Ti Microstructure Machine learning

SCI ; EI

英语

其他

Natural Sciences and Engineering Research Council of Canada (NSERC)[RGPIN-2018-05731] ; China Scholarship Council[201907980002]

Materials Science

Materials Science, Multidisciplinary

WOS:000641650600005

SPRINGER HEIDELBERG

20211810280956

3D printers ; Additives ; Elastic moduli ; Electron probe microanalysis ; Hardness ; K-means clustering ; Mapping ; Microstructure ; Nanoindentation

Surveying:405.3 ; Titanium and Alloys:542.3 ; Printing Equipment:745.1.1 ; Nanotechnology:761 ; Chemistry:801 ; Chemical Agents and Basic Industrial Chemicals:803 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada
2.Beihang Univ, Res Inst Frontier Sci, 37 Xueyuan Rd, Beijing, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Guangdong, Peoples R China

Liu, Zhiying,Zhang, Jiahui,He, Bei,et al. High-speed nanoindentation mapping of a near-alpha titanium alloy made by additive manufacturing[J]. JOURNAL OF MATERIALS RESEARCH,2021,36:2223-2234.

Liu, Zhiying,Zhang, Jiahui,He, Bei,&Zou, Yu.(2021).High-speed nanoindentation mapping of a near-alpha titanium alloy made by additive manufacturing.JOURNAL OF MATERIALS RESEARCH,36,2223-2234.

Liu, Zhiying,et al."High-speed nanoindentation mapping of a near-alpha titanium alloy made by additive manufacturing".JOURNAL OF MATERIALS RESEARCH 36(2021):2223-2234.