Advances in Additive Manufacturing of Ti-Based Alloys: Processing and Simulation

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".

Deadline for manuscript submissions: closed (10 October 2023) | Viewed by 1606

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa, Israel
Interests: selective laser melting; titanium alloy (TiAl6V4); inconel (trademark); high-entropy alloys; laves phases; laser cladding; cast alloys; die castings; eutectics

Special Issue Information

Dear Colleagues,

Titanium alloy has broad application prospects in various industrial fields, including shipbuilding, aerospace, and automobile manufacturing, due to its excellent physical and chemical properties such as low density, high temperature resistance, and corrosion resistance. The application of titanium alloy has played a great role in promoting industrial development and accelerated the development of modern industry.

The additive manufacturing (AM) technology of titanium alloy solves the machining problem of precision structural parts and further increases the application range of titanium alloy. According to the different heat sources of additive manufacturing technology, titanium alloy additive manufacturing technology can be divided into laser/electron beam additive manufacturing, fusion welding additive manufacturing, and solid-state welding additive manufacturing.

In the Special Issue “Advances in Additive Manufacturing of Ti-Based Alloys: Processing and Simulation”, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Atomization processing;
  • Powder properties and characterization;
  • AM technologies: laser/E-beam interaction with the powder (characteristics, advantages, and disadvantages); effect of processing parameters (power, overlapping, scanning speed, scanning pattern, and defects and their correlation with processing characteristics); on-line monitoring and control; process simulation and processing optimization; temperature field-cooling rate-strain-stress-component distortion; surface quality improvement (utilizing source power management/traveling scheme as manufactured microstructure);
  • Post-processing: heat treatment; HIP; surface roughness reduced by mechanical-electrochemical treatment, welding, and assembly; post-processing microstructure and properties;

Prof. Dr. Menachem Bamberger
Guest Editor

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Keywords

  • atomization processing
  • powder properties and characterization
  • AM technologies: laser/E-beam interaction with the powder (characteristics, advantages, and disadvantages)
  • AM technologies: effect of processing parameters (power, overlapping, scanning speed, scanning pattern, and defects and their correlation with processing characteristics)
  • AM technologies: online monitoring and control
  • AM technologies: process simulation and processing optimization
  • AM technologies: temperature field-cooling rate-strain-stress-component distortion
  • AM technologies: surface quality improvement (utilizing source power management/traveling scheme as manufactured microstructure)
  • post-processing: heat treatment
  • post-processing: HIP
  • post-processing: surface roughness reduced by mechanical-electrochemical treatment, welding, and assembly
  • post-processing microstructure and properties
  • applications

Published Papers (1 paper)

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Research

20 pages, 21353 KiB  
Article
Effect of Machine Hammer Peening Conditions on β Grain Refinement of Additively Manufactured Ti-6Al-4V
by Leonor Neto, Stewart Williams, Alec E. Davis and Jacob R. Kennedy
Metals 2023, 13(11), 1888; https://doi.org/10.3390/met13111888 - 14 Nov 2023
Viewed by 1154
Abstract
Ti-6Al-4V components built with wire plus arc additive manufacturing (WAAM) generally have long columnar β grains that cause anisotropic behavior when the material undergoes static and cyclic failure. Recently, machine hammer peening (MHP) has been proved to induce prior-β grain refinement in WAAM [...] Read more.
Ti-6Al-4V components built with wire plus arc additive manufacturing (WAAM) generally have long columnar β grains that cause anisotropic behavior when the material undergoes static and cyclic failure. Recently, machine hammer peening (MHP) has been proved to induce prior-β grain refinement in WAAM resulting in isotropic properties and increased strength. In this study, MHP was investigated for WAAM walls to establish the dependency of the β grain refinement on peening parameters, such as energy, tool radius, and distance between impact steps. All combinations of parameters investigated resulted in grain-refined microstructures. The plastic strain theory failed to explain these results, as the microstructure refinement achieved did not match the strain distribution obtained. Thus, a new theory of accumulated energy was proposed in which the dynamic deformation of the MHP process should also be taken into consideration. The mechanical properties for the MHP conditions showed higher strength and decreased anisotropy as the energy per length increased. This was attributed to the reduction in texture in the WAAM walls. Thus, when applying MHP, the energy per unit length is controlling the grain size obtained and improved mechanical properties can be achieved. Full article
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