4.7 Article

Microstructural evolution and mechanical properties of a novel biomedical Ti-6Zr-4Fe alloy during solution and aging treatment

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出版社

ELSEVIER
DOI: 10.1016/j.jmrt.2022.09.063

关键词

Ti-6Zr-4Fe alloy; Solution treatment; Aging treatment; Microstructure; Mechanical properties

资金

  1. Beijing Natural Science Foundation [2202007]
  2. National Natural Science Foundation of China [91860113, 51621003]
  3. National Key Research and Development Program of China [2021YF- B3704205]
  4. General Program of Science and Technology Development Project of Beijing Municipal Education Commission [KM 202110005010]
  5. QiHang Programme for Faculty of Materials and Manufacturing BJUT [QH202203]
  6. Beijing Laboratory of Metallic Materials and Processing for Modern Transportation

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The microstructural evolution of Ti-6Zr-4Fe alloy solution and aging treated at different temperatures was investigated, and its effects on microhardness and Young's modulus were studied. The formation of the θ phase resulted in an increase in microhardness and Young's modulus in the alloy.
Microstructural evolution and its effect on microhardness and Young's modulus of Ti-6Zr-4Fe alloy solution and aging treated at different temperatures were studied. The a phase transformed into b phase completely at 860 degrees C, meanwhile, the athermal u phase was found at 860 degrees C and it resulted in a higher Young's modulus. The u phase content increased from 250 degrees C to 400 degrees C, and the content decreased with further increase of aging temperature, there were only a phase and b phase at 600 degrees C. The phase transformation sequence was b-> u + b-> u+a+b-> a+b during aging treatment. The microhardness increased from 315 HV to 492 HV due to the element solution strengthening and phase transformation strengthening. The peak microhardness of Ti-6Zr-4Fe alloy aged at 400 degrees C reached 652 HV. The formation of u phase resulted in the increase of microhardness and Young's modulus in Ti-6Zr-4Fe alloy. (c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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