Quantitative Analysis on Microstructural Evolution of Lamellar α Phase in Titanium Alloy during Hot Working

In this paper, the morphologic evolution of α-phases and their influence on mechanical properties during the hot working process of the Ti-6Al-4V alloy has been quantitatively investigated. Samples with a variety of different features of α-phase were obtained by hot working. A quantitative analysis of SEM/OM images is carried out to determine the features of α-phase before and after deformation, including the length, thickness, aspect ratio and volume fraction of α-phase. It was found that the α-phase platelet thickness increases with the increasing of forging height reduction on subsequent solution and aging treatment, larger height reduction would reduce the aspect ratio and length of α-phase and further makes the α-phase closest to equiaxed morphology. Moreover, the influence of the α-phase features on the mechanical properties was systematically investigated. The results indicate that the mechanical properties are strongly determined by the features of the α-phase, especially the thickness and volume fraction of the α-phase. This work will optimize the mechanical property by means of microstructural control and deepen the understanding of influence of α-phase features on the mechanical properties.

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ω-Assisted refinement of α phase and its effect on the tensile properties of a near β titanium alloy

Journal of Material Science and Technology ◽

10.1016/j.jmst.2019.10.031 ◽

2020 ◽

Vol 44 ◽

pp. 24-30 ◽

Cited By ~ 5

Author(s):

Ruifeng Dong ◽

Jinshan Li ◽

Hongchao Kou ◽

Jiangkun Fan ◽

Yuhong Zhao ◽

...

Keyword(s):

Titanium Alloy ◽

Tensile Properties ◽

Α Phase

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Experimental study on microstructural evolution, mechanical property, and corrosion behaviour of laser additive manufactured (LAM) titanium alloy grade 5

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-06872-3 ◽

2021 ◽

Author(s):

Olawale Samuel Fatoba ◽

Tien-Chien Jen ◽

Esther Titilayo Akinlabi

Keyword(s):

Mechanical Property ◽

Experimental Study ◽

Titanium Alloy ◽

Microstructural Evolution ◽

Corrosion Behaviour ◽

Grade 5

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Microstructural Evolution in the TC17 Titanium Alloy Processed During Laser Stereo Forming

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-05550-5 ◽

2021 ◽

Vol 30 (4) ◽

pp. 2967-2976

Author(s):

Shan Liang ◽

Jinghui Li ◽

Qiang Zhang ◽

Jing Chen

Keyword(s):

Titanium Alloy ◽

Microstructural Evolution

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A new insight into the α phase precipitation in β titanium alloy

Vacuum ◽

10.1016/j.vacuum.2021.110272 ◽

2021 ◽

Vol 189 ◽

pp. 110272

Author(s):

Libo Zhou ◽

Jinshan Sun ◽

Ruizhi Zhang ◽

Jian Chen ◽

Jianjun He ◽

...

Keyword(s):

Titanium Alloy ◽

Phase Precipitation ◽

Α Phase ◽

Insight Into

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The Effect of Isothermal Forging Process Parameters on the Microstructure and the Properties of TA15 Near α Titanium Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.26-28.367 ◽

2007 ◽

Vol 26-28 ◽

pp. 367-371

Author(s):

Hong Zhen Guo ◽

Zhang Long Zhao ◽

Bin Wang ◽

Ze Kun Yao ◽

Ying Ying Liu

Keyword(s):

Titanium Alloy ◽

High Temperature ◽

Tensile Properties ◽

Process Parameters ◽

Spherical Shape ◽

Deformation Degree ◽

Isothermal Forging ◽

Forging Process ◽

Α Phase ◽

Strip Shape

In this paper the effect of isothermal forging process parameters on the microstructure and the mechanical properties of TA15 titanium alloy was researched. The results of the tests indicate that, in the range of temperature of 850 °C~980 °C and deformation degree of 20%~60%, with the increase of temperature or deformation, as the reinforcement of deformation recrystallization, the primary α-phase tends to the spherical shape and secondary α-phase transforms from the acicular shape to fine and spherical shape with disperse distribution, which enhance the tensile properties at room and high temperature. With the increment of forging times, the spheroidization of primary α-phase aggrandizes and secondary α-phase transforms from spherical and acicular shape to wide strip shape, which decrease the tensile properties at room and high temperature. The preferable isothermal forging process parameters are temperature of 980 °C, deformation degree of 60%, and few forging times.

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