High speed synchrotron X-ray diffraction experiments resolve microstructure and phase transformation in laser processed Ti-6Al-4V

Seunghee A. Oh; Rachel E. Lim; Joseph W. Aroh; Andrew C. Chuang; Benjamin J. Gould; Behnam Amin-Ahmadi; Joel V. Bernier; Tao Sun; P. Chris Pistorius; Robert M. Suter; Anthony D. Rollett

doi:10.1080/21663831.2021.1966537

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High speed synchrotron X-ray diffraction experiments resolve microstructure and phase transformation in laser processed Ti-6Al-4V

Original Report | 更新时间：2026-08-19

- High speed synchrotron X-ray diffraction experiments resolve microstructure and phase transformation in laser processed Ti-6Al-4V
- Materials Research Letters Vol. 9, Issue 10, Pages: 429-436(2021)
- 作者机构：
  
  1. a Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh
  2. b Department of Materials Science and Engineering Penn State University State College
  3. X-ray Science Division Advanced Photon Source Argonne National Laboratory Lemont,c
  4. d Applied Materials Division Argonne National Laboratory Lemont
  5. e Department of Mechanical Engineering Colorado School of Mines Golden
  6. f Lawrence Livermore National Laboratory Livermore
  7. g Department of Materials Science and Engineering University of Virginia Charlottesville
  8. h Department of Physics Carnegie Mellon University Pittsburgh
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2021.1966537
  CLC：
- Online First：23 August 2021，
  
  Published：2021
- 稿件说明：
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Seunghee A. Oh, Rachel E. Lim, Joseph W. Aroh, et al. High speed synchrotron X-ray diffraction experiments resolve microstructure and phase transformation in laser processed Ti-6Al-4V[J]. Materials Research Letters, 2021, 9(10): 429-436.
DOI：

Seunghee A. Oh, Rachel E. Lim, Joseph W. Aroh, et al. High speed synchrotron X-ray diffraction experiments resolve microstructure and phase transformation in laser processed Ti-6Al-4V[J]. Materials Research Letters, 2021, 9(10): 429-436. DOI： 10.1080/21663831.2021.1966537.

摘要

Abstract

The microstructures of Ti-6Al-4V following laser processing depend primarily on the phase transformation of β to α

but their development is constrained by the rapidly changing temperature in the small fusion zone.

In-situ

synchrotron X-ray diffraction was utilized to probe the rapid phase evolution in single melt tracks with high angular and temporal resolution. Both fully martensitic and mixed α+α′+β microstructures were confirmed by microscopy. Cooling rates were inferred from the lattice parameter history and complementary thermal simulation. It was found that the threshold cooling rate for fully martensitic transformation is in the range between 2900 and 6500°C/s.

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