Effect of α texture on the anisotropy of yield strength in Ti–6Al–2Zr–1Mo–1V alloy fabricated by laser directed energy deposition technique

Li, Renkai; Wang, Huaming; He, Bei; Li, Zhuo; Zhu, Yanyan; Zheng, Dewen; Tian, Xiangjun; Zhang, Shuquan

doi:10.1016/j.msea.2021.141771

Cited by 38 publications

(4 citation statements)

References 53 publications

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“…It has been revealed that the malleability of the TA15 titanium alloy at ambient temperatures experiences a substantial augmentation subsequent to thermal treatment or hot isostatic pressing. However, it remains inferior to 18% [15,16,19,20]. The elongation of the specimen produced by L-PBF was found to be less than 12% [12,15].…”

Section: Of 13mentioning

confidence: 84%

Impact of Hot Isostatic Pressing Temperature on Tensile Properties of TA15 Titanium Alloy Produced via Laser Powder Bed Fusion

Ci,

Hu,

Cheng

et al. 2023

Coatings

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TA15 titanium alloy holds great significance as a crucial material in the aerospace industry. In order to gain deeper insights into the influence of hot isostatic pressing (HIP) temperature on the tensile characteristics of materials formed through laser powder bed fusion (L-PBF), a comparative heat treatment experiment was crafted, aligning with the HIP treatment temperature settings. Specifically, the temperatures selected for this investigation were 900 °C, 940 °C, 980 °C, and 1020 °C, while the duration of the holding time was set at 2 h. Notably, the microstructure within the β phase region demonstrated distinct disparities between the HIP-treated specimens and those subjected to heat treatment. The heat-treated specimens exhibited the formation of Widmanstatten structure at 980 °C, while the metallographic structure of the HIP-treated specimens consisted of the lath α phase. In heat-treated specimens, an upward trend in temperature from 900 °C to 1020 °C led to a gradual decrease in UTS (995 MPa, 947 MPa, 886 MPa, and 892 MPa), YS (921 MPa, 865 MPa, 799 MPa, and 784 MPa). The elongation (15.7%,14.6%, and 13.3%) diminished as the temperature increased from 900 °C to 980 °C. At 1020 °C, the elongation slightly increased to 13.9%. The HIP-treated specimens showcased a declining trend in UTS (1008.5 MPa, 947 MPa, 886 MPa, and 892 MPa) and YS (939 MPa, 897.5 MPa, 839.5 MPa, and 844.5 MPa) with an increase in HIP treatment temperature from 900 °C to 980 °C, after which they experienced a slight increment upon further elevation to 1020 °C. The elongation (16%,18.3%, and 20.5%) demonstrated a remarkable improvement from 900 °C to 980 °C. At 1020 °C, the elongation decreased to 17.5%.

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Section: Of 13mentioning

confidence: 84%

Impact of Hot Isostatic Pressing Temperature on Tensile Properties of TA15 Titanium Alloy Produced via Laser Powder Bed Fusion

Ci,

Hu,

Cheng

et al. 2023

Coatings

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“…The optimal addition of Mo and Cr elements improve the strength and plasticity by the fine grain strengthening effect [13]. And the Sn and Zr elements were added to improve the strength by solution strengthening effect and keep the mechanical properties stable at high operation temperature [14]. With the rapid development of aviation industry, the composition design and preparation for new Ti alloy with high strength and high toughness always deserves serious concern.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of a newly developed Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V alloy fabricated by laser directed energy deposition

Wang,

Yi,

Yang

et al. 2024

Mater. Res. Express

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With the rapid development of aviation industry, the study of novel titanium (Ti) alloy with superior mechanical properties is of great significance. In this paper, a newly developed Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V alloy was fabricated by laser directed energy deposition (L-DED), which exhibits coarse β columnar grains containing the basket-weave structure knitted with α phases and β phases. After solution and aging heat-treatment, the fine secondary α phase precipitates, which leads to the increase in microhardness. The as-deposited sample exhibits the tensile strength of 1025 MPa and the elongation of 6.0%. With solution temperature increasing, the strength increases but the plasticity first increases and then decreases. The fracture mechanism shows a mixed of ductile and brittle fracture. The average impact toughness of as-deposited sample in building direction is 40.9 J/cm2 higher than that (23.4 J/cm2) in direction perpendicular to building direction. After solution and aging heat-treatment, the impact toughness improves significantly.

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“…Metal additive manufacturing (AM) techniques, including laser powder bed fusion (LPBF) [24][25][26] and laser powder deposition (LPD) [27][28][29], have been confirmed to successfully fabricate complex structures of titanium alloy parts. Compared with others, research has mainly concentrated on the directed-energy-deposition-fabricated TA15 titanium alloy [30,31], which can directly fabricate the large-scale complex structural components. However, in order to obtain the TA15 structural parts with higher precision, some studies have conducted research on LPBF-processed TA15 titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Parameters in Laser Powder Bed Fusion TA15 Titanium Alloy Using Taguchi Method

Liu

Wang

et al. 2022

Crystals

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In this work, laser powder bed fusion (LPBF) was explored to fabricate TA15 (Ti-6Al-2Zr-1Mo-1V) titanium alloy based on the experimental design obtained by using the Taguchi method. The impact of processing parameters (including laser power, scanning speed, and scanning interval) on the density and microhardness of the as-LPBFed TA15 titanium alloy was analyzed using the Taguchi method and analysis of variance (ANOVA). The interaction among parameters on the density of the as-LPBFed TA15 titanium alloy was indicated by a response surface graph (RSR). When the laser energy density was adjusted to 100 J/mm3, the highest relative density could reach 99.7%. The further increase in the energy input led to the reduction in relative density, due to the formation of tiny holes caused by the vaporization of material at a high absorption of heat. Furthermore, in order to better reveal the correlation between relative density and processing parameters, the regression analysis was carried out for relative density. The results showed that the experimental and predicted values obtained by the regression equation were nearly the same.

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Effect of α texture on the anisotropy of yield strength in Ti–6Al–2Zr–1Mo–1V alloy fabricated by laser directed energy deposition technique

Cited by 38 publications

References 53 publications

Impact of Hot Isostatic Pressing Temperature on Tensile Properties of TA15 Titanium Alloy Produced via Laser Powder Bed Fusion

Impact of Hot Isostatic Pressing Temperature on Tensile Properties of TA15 Titanium Alloy Produced via Laser Powder Bed Fusion

Microstructure and mechanical properties of a newly developed Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V alloy fabricated by laser directed energy deposition

Optimization of Parameters in Laser Powder Bed Fusion TA15 Titanium Alloy Using Taguchi Method

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