Strength–ductility balance of powder metallurgy Ti–2Fe–2W alloy extruded at high-temperature

Bahador A., Issariyapat A., Umeda J., YAMANOĞLU R., Pruncu C., Amrin A., ...Daha Fazla

Journal of Materials Research and Technology, cilt.14, ss.677-691, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jmrt.2021.06.086
  • Dergi Adı: Journal of Materials Research and Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, Directory of Open Access Journals
  • Sayfa Sayıları: ss.677-691
  • Anahtar Kelimeler: Solid solution, Grain refinement, Hot extrusion, Tensile properties, Microstructure, alpha plus beta Ti alloys, MECHANICAL-PROPERTIES, HOT-WORKING, DEFORMATION MECHANISMS, TITANIUM-ALLOY, TI MATERIALS, MICROSTRUCTURE, BEHAVIOR, GLOBULARIZATION, TI-6AL-4V, RECRYSTALLIZATION
  • Kocaeli Üniversitesi Adresli: Evet

Özet

© 2021 The AuthorsThis study aims to improve the mechanical properties of a Ti–2Fe base alloy by adding W solute and performing hot extrusion at a high temperature (1000 °C). W was added at 0, 1, 2, and 3 wt% using the powder metallurgy route and homogenization heat treatment. The as-extruded materials predominantly consisted of α phase with different microstructure morphologies; Ti–2Fe and Ti–2Fe–1W contained equiaxed α grains, while Ti–2Fe–2W and Ti–2Fe–3W showed equiaxed + acicular and acicular shape, respectively. Effective grain refinement was obtained in Ti–2Fe–2W (average grain size: ~1.64 μm), which greatly contributed to the strengthening. The solid solution of W was studied with X-ray powder diffraction, where a proportional increment of β lattice constant occurred as the W solute increased in the matrix (Ti–Fe). Additionally, electron backscatter diffraction analysis revealed that the W solution reduced the intensity of the prismatic texture along the extrusion direction. Based on the experimental evaluations, extruded Ti–2Fe–2W alloy exhibited a maximum yield strength of 925 MPa with excellent elongation 30% at room temperature, indicating a remarkable trade-off in strength and ductility.