Achieving strength-ductility synergy in a laser-powder bed fused near-α titanium alloy through well-crafted heat treatments

Kaushik, Harish Chandra; Korayem, Mahdi Habibnejad; Shaha, Sugrib Kumar; Kacher, Josh; Hadadzadeh, Amir

doi:10.1016/j.jallcom.2023.171913

Cited by 4 publications

(2 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the STA-1 sample, after the tensile test, a large number of dislocations was observed not only at the α s interface, but also entangled around the nano-β phase inside the α s , as shown in Figure 10(b,b1). In summary, the reason for the increase in the strength of the STA-1 sample was that, during the aging process, the α' martensite decomposed to the α s and nano-β phases; meanwhile, the α s and nano-β phase could effectively hinder the dislocation motion during the deformation of the alloy [38].…”

Section: Effect Of Microstructure Evolution On Mechanical Propertiesmentioning

confidence: 98%

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Xiao,

Hu,

et al. 2024

Materials

View full text Add to dashboard Cite

Three types of solution treatment and aging were designed to reveal the α’ decomposition and its effect on the mechanical properties of near-α Ti-80 alloy, as follows: solution at 970 °C then quenching (ST), ST + aging at 600 °C for 5 h (STA-1), and ST + aging 600 °C for 24 h (STA-2). The results show that the microstructures of the ST samples were mainly composed of equiaxed αp and acicular α’, with a large number of dislocations confirmed by the KAM results. After subsequent aging for 5 h, α’ decomposed into acicular fine αs and nano-β (intergranular β, intragranular β) in the STA-1 specimen, which obstructed dislocation motion during deformation, resulting in the STA-1 specimen exhibiting the most excellent yield strength (1012 MPa) and maintaining sufficient elongation (8.1%) compared with the ST (898 MPa) and STA-2 (871 MPa) samples. By further extending the aging time to 24 h, the size of acicular αs and nano-β gradually increased while the density of dislocations decreased, which resulted in a decrease in strength and an increase in plasticity. Based on this, a microstructures–properties correlation model was proposed. This study provides a new method for strength–plasticity matching of near-α titanium alloys through α’ decomposition to acicular αs+nano-β.

show abstract

Section: Effect Of Microstructure Evolution On Mechanical Propertiesmentioning

confidence: 98%

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Xiao,

Hu,

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…It is widely utilized in airplanes, ships, and medical devices, among other things [1][2][3]. Meanwhile, it has earned the moniker "space metal", "bio-metal", and "ocean metal", among others [4,5]. Ti-6Al-4V is one of the most extensively used commercial titanium alloys and a typical representative of titanium alloy [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Inverse Identification of Drucker–Prager Cap Model for Ti-6Al-4V Powder Compaction Considering the Shear Stress State

Li,

Liu,

et al. 2023

Metals

View full text Add to dashboard Cite

Numerical simulation is an important method to investigate powder-compacting processes. The Drucker–Prager cap constitutive model is often utilized in the numerical simulation of powder compaction. The model contains a number of parameters and it requires a series of mechanical experiments to determine the parameters. The inverse identification methods are time-saving alternatives, but most procedures use a flat punch during the powder-compacting process. It does not reflect the densification behavior under a shearing stress state. Here, an inverse identification approach for the Drucker–Prager cap model parameters is developed by using a hemispherical punch for the powder-compacting experiment. The error between the numerical and experimental displacement–load curves was minimized to identify the Drucker–Prager cap model of titanium alloy powder. The identified model was then verified by powder-compacting experiments with the flat punch. The displacement–load curves acquired by numerical simulation were compared to the displacement–load curves obtained through experiments. The two curves are found to be in good agreement. Meanwhile, the relative density distribution of the powders is similar to the experimental results.

show abstract

Tailoring microstructure and mechanical anisotropy of laser-MIG hybrid additive manufacturing TC11 titanium alloy through solution aging treatment

Guo,

Liu,

Zhao

et al. 2024

J Mater Sci

View full text Add to dashboard Cite

Achieving strength-ductility synergy in a laser-powder bed fused near-α titanium alloy through well-crafted heat treatments

Cited by 4 publications

References 75 publications

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Inverse Identification of Drucker–Prager Cap Model for Ti-6Al-4V Powder Compaction Considering the Shear Stress State

Tailoring microstructure and mechanical anisotropy of laser-MIG hybrid additive manufacturing TC11 titanium alloy through solution aging treatment

Contact Info

Product

Resources

About