Electro-strengthening of the additively manufactured Ti–6Al–4V alloy

Structure-property-processing relationship has been studied in additively manufactured Ti–6Al–4V alloy. The processing was performed using in-situ electron microscope (EM) at a moderate current density of 5 × 105 A/cm2 applied for 5 min, and by suppressing Joule heating with massive heat sinks such that the temperature rise was <180 °C and the mechanical properties were not compromised. The results show that while the grain size increased by ~15%, the nanohardness increased by 16%. This is attributed to the pronounced dislocation generation, regeneration, and clustering as well as defect healing. Ultimately, there is a reduction in the residual strain and a significant increase in the intrinsic strength as evidenced by the high Taylor factor of the electric current processed specimen. This novel processing technique represents an alternative pathway for active controlling of microstructure and internal defects for parts that might be sensitive to high-temperature processing or conventional methods.

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Work Title Electro-strengthening of the additively manufactured Ti–6Al–4V alloy
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Open Access
Creators
  1. Daudi Waryoba
  2. Zahabul Islam
  3. Ted Reutzel
  4. Aman Haque
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Publication Date November 4, 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.msea.2020.140062
Deposited November 15, 2021

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  • Added MSEA-D-20-02964_Revised_Manuscript.docx
  • Added Creator Daudi Waryoba
  • Added Creator Zahabul Islam
  • Added Creator Ted Reutzel
  • Added Creator Aman Haque
  • Published
  • Updated
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