High-temperature oxidation behavior of a cast Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy

Lin, Xuejian; Huang, Hong-jun; Yuan, Xiao-guang; Wang, Yinxiao; Zheng, Bowen; Zuo, Xiaojiao; Zhou, Ge

doi:10.1007/s41230-022-2041-y

Cited by 6 publications

(3 citation statements)

References 35 publications

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“…According to the cross-sectional How to inhibit the formation and growth of TiO 2 and promote the formation of continuous dense Al 2 O 3 is the key to improving the oxidation resistance of TiAl alloys [26]. In the TiAl alloy, because the oxidation kinetics of the Ti and Al elements to form TiO 2 and Al 2 O 3 are similar, a continuous Al 2 O 3 film cannot be formed in the air atmosphere, but TiO 2 and Al 2 O 3 are formed at the same time [27]. Since the self-diffusion coefficient of the Ti element in the TiAl alloy is much larger than that of the Al element, it is beneficial to the outer diffusion of Ti to form the outermost TiO 2 layer.…”

Section: Cross-sectional Morphology Of Oxide Scalementioning

confidence: 99%

Cyclic Oxidation Kinetics and Thermal Stress Evolution of TiAl Alloys at High Temperature

Tian,

Zhang,

Zeng

et al. 2023

Metals

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The oxidation resistance of TiAl alloys is crucial for their commercial application. In this paper, a cyclic oxidation test with stable air circulation was designed to investigate the cyclic oxidation behavior of the TNM alloy and 4822 alloy at 800 °C and to analyze the phase, morphology, and thermal stress evolution of the oxide layer. The oxidation weight gain curves of both alloys are found to be in parabolic form, and the oxidation reaction orders of the TNM alloy and 4822 alloy are 2.374 and 1.838, respectively. The Nb and Mo elements enhance the antioxidant performance of the TNM alloy by inhibiting the dissolution and diffusion of oxygen, Ti, and Al atoms in the TiAl alloy. The thermal stress evolution of the two alloys during the heating and cooling phases of the cyclic oxidation process are calculated separately, and it is found that the thermal stresses in the TNM alloy are smaller than those in the 4822 alloy, while the maximum thermal stresses appear at the oxide/substrate interface rather than inside the oxide scale, which quantitatively explains the oxidation peeling resistance of the two alloys.

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Section: Cross-sectional Morphology Of Oxide Scalementioning

confidence: 99%

Cyclic Oxidation Kinetics and Thermal Stress Evolution of TiAl Alloys at High Temperature

Tian,

Zhang,

Zeng

et al. 2023

Metals

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“…The results showed that the samples prepared by SLM had better strength and hardness. In terms of high-temperature oxidation performance, Lin [11] concluded through cyclic oxidation tests and static oxidation experiments at different temperatures that the oxidation operation at high temperatures helps to improve the elongation performance and tensile strength of GH5188. Jin et al [12][13][14] carried out research on rolling bending and rolling forming of GH5188 plates and provided theoretical guidance for related manufacturing processes by combining simulation and experimentation.…”

Section: Introductionmentioning

confidence: 99%

Study on Hot Deformation Behavior and Processing Maps of Cobalt‐Based Superalloy GH5188

Liu,

Lai,

Huang

et al. 2024

Adv Eng Mater

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True stress‐strain data were obtained through the thermal compression test of the cobalt‐based superalloy GH5188 at the temperature range of 1080°C ‐ 1180°C and the strain rate of 0.1‐10s‐1, and the Arrhenius constitutive equation considering the effects of temperature, strain rate and strain were established. The microscopic deformation mechanism and the appropriate process range were proposed based on the analysis of the Dynamic Material Model (DMM) and Electron Backscattered Diffraction (EBSD).The results show that the established constitutive equation exhibits predictive ability, and the calculated thermal activation energy Q value is 446.1054KJ/mol; When the strain is 0.7, the GH5188 superalloy undergoes Dynamic Recrystallization (DRX) at 1130°C in the form of discontinuous DRX; When the temperature is 1180°C, the degree of DRX is significantly improved, and evenly distributed equiaxed grains are obtained; When the strain is 0.2, 0.4 and 0.6, DRX is mainly affected by the degree of deformation, and and its occurrence is accompanied by the generation of Σ3. Combined with the analysis of the processing maps and EBSD diagrams, the optimal thermal deformation parameters of GH5188 alloy are determined as follows: the strain is 0.7, the deformation temperature is about 1180°C, and the strain rate is about 1s‐1.This article is protected by copyright. All rights reserved.

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“…High-temperature titanium alloys are widely used in aerospace and military fields due to their excellent properties, such as low density, high specific strength, high specific stiffness and excellent high-temperature creep properties [1][2][3]. With the development of aerospace vehicles towards higher flight speeds, in addition to requiring titanium alloys with low density and high strength, they are also required to withstand higher temperatures [4,5]. At present, the maximum service temperature of titanium alloys used for a long period can reach 600 • C. Typical brands are Ti-1100, IMI834, BT36, Ti60 and Ti600 alloys [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Y Content on Precipitation Behavior, Oxidation and Mechanical Properties of As-Cast High-Temperature Titanium Alloys

Shen

Wang³

et al. 2023

Materials

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To improve the heat resistance of titanium alloys, the effects of Y content on the precipitation behavior, oxidation resistance and high-temperature mechanical properties of as-cast Ti-5Al-2.75Sn-3Zr-1.5Mo-0.45Si-1W-2Nb-xY (x = 0.1, 0.2, 0.4) alloys were systematically investigated. The microstructures, phase evolution and oxidation scales were characterized by XRD, Laser Raman, XPS, SEM and TEM. The properties were studied by cyclic oxidation as well as room- and high-temperature tensile testing. The results show that the microstructures of the alloys are of the widmanstätten structure with typical basket weave features, and the prior β grain size and α lamellar spacing are refined with the increase of Y content. The precipitates in the alloys mainly include Y2O3 and (TiZr)6Si3 silicide phases. The Y2O3 phase has specific orientation relationships with the α-Ti phase: (002)Y2O3 // (1¯1¯20)α-Ti, [110]Y2O3 // [4¯401]α-Ti. (TiZr)6Si3 has an orientation relationship with the β-Ti phase: (022¯1¯)(TiZr)6Si3 // (011)β-Ti, [1¯21¯6](TiZr)6Si3 // [044¯]β-Ti. The 0.1 wt.% Y composition alloy has the best high-temperature oxidation resistance at different temperatures. The oxidation behaviors of the alloys follow the linear-parabolic law, and the oxidation products of the alloys are composed of rutile-TiO2, anatase-TiO2, Y2O3 and Al2O3. The room-temperature and 700 °C UTS of the alloys decreases first and then increases with the increase of Y content; the 0.1 wt.% Y composition alloy has the best room-temperature mechanical properties with a UTS of 1012 MPa and elongation of 1.0%. The 700 °C UTS and elongation of the alloy with 0.1 wt.% Y is 694 MPa and 9.8%, showing an optimal comprehensive performance. The UTS and elongation of the alloys at 750 °C increase first and then decrease with the increase of Y content. The optimal UTS and elongation of the alloy is 556 MPa and 10.1% obtained in 0.2 wt.% Y composition alloy. The cleavage and dimples fractures are the primary fracture mode for the room- and high-temperature tensile fracture, respectively.

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High-temperature oxidation behavior of a cast Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy

Cited by 6 publications

References 35 publications

Cyclic Oxidation Kinetics and Thermal Stress Evolution of TiAl Alloys at High Temperature

Cyclic Oxidation Kinetics and Thermal Stress Evolution of TiAl Alloys at High Temperature

Study on Hot Deformation Behavior and Processing Maps of Cobalt‐Based Superalloy GH5188

Effect of Y Content on Precipitation Behavior, Oxidation and Mechanical Properties of As-Cast High-Temperature Titanium Alloys

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