Research progress on microstructure evolution and hot processing maps of high strength β titanium alloys during hot deformation

Huang, Liang; Li, Changmin; LI, Cheng-lin; Hui, Songxiao; Yu, Yang; Zhao, Mingjie; Guo, Shiqi; LI, Jian-jun

doi:10.1016/s1003-6326(22)66062-x

Cited by 11 publications

(5 citation statements)

References 142 publications

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“…Besides this, the groove depth was also influenced by the misorientation of the α/α boundaries. Therefore, HAGBs were more likely to show development of the groove depth [42]. By further increasing the strain to 0.9, the α lamellae gradually sphered to reduce the total interfacial energy (Figure 10c).…”

Section: Correlation Of Spheroidization Mechanisms and Deformation Te...mentioning

confidence: 99%

Dynamic Spheroidization Mechanism and Its Orientation Dependence of Ti-6Al-2Mo-2V-1Fe Alloy during Subtransus Hot Deformation

Ge,

Zhan,

et al. 2023

Materials

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The dynamic spheroidization mechanism and its orientation dependence in Ti-6Al-2Mo-2V-1Fe alloys during subtransus hot deformation were studied in this work. For this purpose, hot compression tests were carried out at temperatures of 780–880 °C, with strain rates of 0.001–0.1 s−1. Based on SEM, EBSD and TEM characterization, the results showed that the aspect ratio of the α phase decreased with increasing deformation temperatures and decreasing strain rates. At 880 °C/0.001 s−1, the aspect ratio of the α phase was the smallest at 2.05. The proportion of HAGBs decreased with increasing temperatures and strain rates, which was different from the trend of the spheroidization; this indicated that the formation of HAGBs was not necessary for the spheroidization process. Furthermore, the formation of the α/α interface was related to the evolution of dislocations and twin boundaries at high (880 °C) and low temperatures (780 °C), respectively. Moreover, the dependence of lamellar spheroidization on the crystallographic orientation tilt from the compression direction (θ) was clarified: when θ was between 45° and 60°, both the prism <a> slip and basal <a> slip systems were activated together, which was more favorable for spheroidization. This study could provide guidance for titanium alloy process designs and microstructure regulation.

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Section: Correlation Of Spheroidization Mechanisms and Deformation Te...mentioning

confidence: 99%

Dynamic Spheroidization Mechanism and Its Orientation Dependence of Ti-6Al-2Mo-2V-1Fe Alloy during Subtransus Hot Deformation

Ge,

Zhan,

et al. 2023

Materials

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“…β-type titanium alloys generally have the advantages of high strength, low modulus of elasticity and good toughness [16,20]. Their body-centered cubic structure gives them more slip systems, thereby granting β-type titanium alloys a more pronounced plastic deformation capacity compared to α-type titanium alloys.…”

Section: The Main Structure Of Titanium Alloy and Its Propertiesmentioning

confidence: 99%

“…[6]. The microstructure of near-β alloys is shown in Figure 3 [20]. Near-β alloys have strict requirements for thermo-mechanical processing, and improper treatment processes are prone to form abnormally coarse grains, affecting the quality of the structural components [22].…”

Section: The Main Structure Of Titanium Alloy and Its Propertiesmentioning

confidence: 99%

Overview of Surface Modification Techniques for Titanium Alloys in Modern Material Science: A Comprehensive Analysis

Gao,

Zhang,

et al. 2024

Coatings

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Titanium alloys are acclaimed for their remarkable biocompatibility, high specific strength, excellent corrosion resistance, and stable performance in high and low temperatures. These characteristics render them invaluable in a multitude of sectors, including biomedicine, shipbuilding, aerospace, and daily life. According to the different phases, the alloys can be broadly categorized into α-titanium and β-titanium, and these alloys demonstrate unique properties shaped by their respective phases. The hexagonal close-packed structure of α-titanium alloys is notably associated with superior high-temperature creep resistance but limited plasticity. Conversely, the body-centered cubic structure of β-titanium alloys contributes to enhanced slip and greater plasticity. To optimize these alloys for specific industrial applications, alloy strengthening is often necessary to meet diverse environmental and operational demands. The impact of various processing techniques on the microstructure and metal characteristics of titanium alloys is reviewed and discussed in this research. This article systematically analyzes the effects of machining, shot peening, and surface heat treatment methods, including surface quenching, carburizing, and nitriding, on the structure and characteristics of titanium alloys. This research is arranged and categorized into three categories based on the methods of processing and treatment: general heat treatment, thermochemical treatment, and machining. The results of a large number of studies show that surface treatment can significantly improve the hardness and friction mechanical properties of titanium alloys. At present, a single treatment method is often insufficient. Therefore, composite treatment methods combining multiple treatment techniques are expected to be more widely used in the future. The authors provide an overview of titanium alloy modification methods in recent years with the aim of assisting and promoting further research in the very important and promising direction of multi-technology composite treatment.

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“…Notably, employing the β forging process yields a refined microstructure, significantly enhancing fracture toughness and fatigue resistance. Its applications span critical components like engine fans, compressor discs, and large cross-section forgings, solidifying its indispensable role in aerospace engineering [6,7]. Selective laser melting (SLM) is a significant technology utilizing high-energy laser beams to melt and solidify metal powder, producing parts with high accuracy and superior mechanical properties, making them highly sought after in aerospace applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of different treatment processes on microstructure and tensile fracture behaviour of selected laser melting TC17 titanium alloy

Jiang,

Dong,

Chen

et al. 2024

J. Phys.: Conf. Ser.

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It is essential to study the tensile fracture mechanism of additively manufactured materials and develop the effective process treatment techniques to improve their fracture resistance. In this paper, the effects of different treatment processes on the microstructure and tensile fracture properties of TC17 titanium alloy melted by laser selective zone melting were investigated. The static tensile fracture morphological characteristics were observed by combining SEM and EDS. The metallographic microstructure after chemical corrosion was observed optically. And the tensile fracture morphology of the three states of TC17 titanium alloy samples at room temperature conditions was investigated. The results show that the metallographic matrix microstructure of TC17 titanium alloy after HT, HIP and HIP-HT treatments was a bimodal structure with α+β phases, i.e., β phase was in the form of a net basket, and α phase was in the form of a coarse bar. The grain sizes of the samples treated by different processes were different, but the difference in grain size of the HT-treated tissues was small, and the difference in grain size of the HIP-HT-treated tissues was large. And the coarse α-phase segregation could be seen at the edge of the samples. The 3D-printed materials had complex changes in anisotropic properties affected by the printing structure and tissue. The printed tissues were brittle and had high internal stresses. These problems were partly improved at high temperatures, but they still existed. The HIP-HT-treated materials had a large α+β-phase bimodal structure. The HT-treated material had coarse grains and precipitation phases, poor room temperature plasticity, and improved high temperature plasticity. After HT treatment, the original printing microstructure changed, the strength and plasticity were significantly improved, but the macroscopic printing structure still had a slight influence on the fracture morphology. When HIP treatment temperature was higher, the influence of macroscopic printing structure basically disappeared, but the grain and microstructure grew up, and the strength and plasticity were slightly lower than that of the HT treatment. HIP process basically eliminated the unfused defects of the three-dimensional morphology, and the local weak bonding zone formed.

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Research progress on microstructure evolution and hot processing maps of high strength β titanium alloys during hot deformation

Cited by 11 publications

References 142 publications

Dynamic Spheroidization Mechanism and Its Orientation Dependence of Ti-6Al-2Mo-2V-1Fe Alloy during Subtransus Hot Deformation

Dynamic Spheroidization Mechanism and Its Orientation Dependence of Ti-6Al-2Mo-2V-1Fe Alloy during Subtransus Hot Deformation

Overview of Surface Modification Techniques for Titanium Alloys in Modern Material Science: A Comprehensive Analysis

Effects of different treatment processes on microstructure and tensile fracture behaviour of selected laser melting TC17 titanium alloy

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