open access publication

Article, 2023

An Investigation into the Microstructural Response to Flexural Stresses of a Metastable β‐Phase Ti Alloy produced by Blended Elemental Powder Metallurgy

Advanced Engineering Materials, ISSN 1527-2648, 1438-1656, Volume 26, 4, 10.1002/adem.202300350

Contributors

Naseri, Ryan [1] Mitchell, David Richard Graham 0000-0002-5398-124X [1] Gazder, Azdiar Adil 0000-0001-5046-9702 [1] Niessen, Frank 0000-0001-5849-710X [2] Nancarrow, Mitchell J B [1] Savvakin, Dmytro G [3] Pereloma, Elena V (Corresponding author) [1]

Affiliations

  1. [1] University of Wollongong
    2. [NORA names: Australia; Oceania; OECD];
  2. [2] Technical University of Denmark
    3. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] National Academy of Sciences of Ukraine
    4. [NORA names: Ukraine; Europe, Non-EU]

Abstract

A Ti‐10V‐3Al‐3Fe metastable β Ti alloy is strained under three‐point bending conditions according to the ASTM E290‐14 standard. A combination of electron backscatter diffraction (EBSD) mapping and high‐resolution scanning transmission electron microscopy (STEM) is used to investigate the microstructural response to flexural stress. Results reveal a delayed formation of the deformation products, due to the load‐bearing capacity of the constituent voids. The deformation products are confined in narrow bands on either side of the fracture surface. {332}⟨113⟩ twinning system is identified as the primary deformation mode followed by the formation of α ″ martensite both in β matrix and β twins. Accommodation of the microscopic strain arising from the development of α ″ structure and β ‐twinning triggers the formation of fine deformation‐induced ω plates, which are observed predominantly at the interfacial plane of β / β twin and β / α ″, and also in the interior of the β twins.

Keywords

A-, ASTM, B twins, Blended Elemental Powder Metallurgy, E290, Ti alloys, accommodation, alloy, backscatter diffraction, band, bending conditions, blends, capacity, combination, combination of electron backscatter diffraction, conditions, constituents, deformation, deformation modes, deformation products, delayed formation, development, diffraction, electron backscatter diffraction, electron microscopy, elemental powder metallurgy, flexural stress, flexure, formation, fracture, fracture surfaces, high-resolution scanning transmission electron microscopy, interfacial plane, interior, investigation, load-bearing capacity, maps, matrix, metallurgy, microscopic strain, microscopy, microstructural response, mode, narrow band, powder metallurgy, primary deformation mode, production, response, results, scanning transmission electron microscopy, standards, strain, stress, structure, surface, system, three-point bending conditions, transmission electron microscopy, twin, twin system, voids

Funders

  • Australian Research Council

Data Provider: Digital Science

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