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Ambient and High-Temperature Bulk Characterization of Additively Manufactured Ti-6Al-4V Using Neutron Diffraction

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
 [1];  [2];  [1];  [3];  [3];  [4];  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); JFE Steel Corporation, Kurashiki (Japan)
  3. Nuclear Research Center Negev, Beer-Sheva (Israel). Physics Dept.
  4. Nuclear Research Center Negev, Beer-Sheva (Israel). Materials Engineering Dept.; Rotem Industries Ltd, Mishor Yamin (Israel)
+ Show Author Affiliations
Characterization of the bulk microstructure using neutron diffraction has been applied to investigate the phase fractions and textures of α- and β-phases in Ti-6Al-4V fabricated by additive manufacturing. The microstructure of a specimen cut from a fan structure, built by either electron beam melting (EBM) or selective laser melting, indicated that predominantly the build direction and not the fan angle determines the microstructure. In situ heating experiments of specimens from a rod built using EBM provided insight into the lattice strain, phase fraction, and texture evolution, providing a rich picture of the microstructure changes during heat treatment of additively manufactured Ti-6Al-4V. Finally, a remarkably low weight fraction of β-phase at lower temperatures, deviations from thermal expansion behavior attributed to vanadium repartitioning, as well as texture strengthening were observed.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Israel Ministry of Science, Technology and Space; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
89233218CNA000001; AC52-06NA25396
OSTI ID:
1483519
Report Number(s):
LA-UR--18-23062
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Journal Name: JOM. Journal of the Minerals, Metals & Materials Society Journal Issue: 9 Vol. 70; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Mapping the Tray of Electron Beam Melting of Ti-6Al-4V: Properties and Microstructure journal May 2019

Figures / Tables (9)

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Table 2(p. 8)table Table 2
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Related Subjects

36 MATERIALS SCIENCE
Additive Manufacturing
Ti alloys
neutron diffraction
texture