A novel method and mechanism for simultaneously refining microstructure and controlling grain orientation in Ti48Al2Cr2Nb2.5C alloy

Wang, Shu; Fang, Hongyuan; Chen, Dezhi; Chen, Ruirun; Zhou, Lingyan; Yang, Xiaokang; Su, Yanqing

doi:10.1016/j.apmt.2022.101516

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…Since the global economic crisis, which has recently been exacerbated by the pandemic and the war in Ukraine, looking for cheaper, more available, and lighter substitutes for alloying elements to be used in titanium alloys has begun. In addition to chromium, iron, and manganese, the group of substitutes that meets these criteria also includes interstitial elements, in particular, carbon, which may be a desirable addition also in other groups of titanium alloys [ 19 , 20 , 21 , 22 ], including in the newest and most forward-looking group of TiAl intermetallic alloys, where the addition of carbon results in the expected improvement in creep resistance [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon in Commercially Pure Titanium

Szkliniarz

2023

Materials

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In a way so far unmatched in any single study, this paper presents the complex characteristics of commercially pure titanium (CP-Ti) containing 0.2 wt.% carbon, which is significantly above the carbon level in commonly used titanium alloys, while at the same time being the maximum permitted content in light of the recommendations in force. It has been demonstrated that the addition of carbon in CP-Ti can have many positive impacts. The investigated Ti-0.2C alloy was produced in a cold-copper crucible induction vacuum furnace and processed into a 12 mm diameter bar by hot rolling. The structure and properties of the Ti-0.2C alloy were compared to those of an CP-Ti Grade 1 produced and processed under the same technical conditions. The addition of 0.2 wt.% carbon to CP-Ti has been found to change the course of the crystallization process, the course and temperatures of phase transformations, and the values of lattice parameters; reduce susceptibility to grain growth; and create the possibility for additional hardening during solution treatment and aging. At the same time, it results in an assumed improvement in properties by increasing the tensile strength and yield strength, hardness, creep and oxidation resistance, and abrasive wear. It has a negative effect but is still within the acceptable range on impact strength and susceptibility to hot and cold deformation.

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Section: Introductionmentioning

confidence: 99%

Carbon in Commercially Pure Titanium

Szkliniarz

2023

Materials

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“…Researchers have conducted research on the application of ultrasonic radiation rods [12][13][14][15][16] over the past few years. Shi et al [17] prepared an 2A14 aluminum alloy using a ceramic steel structure radiation rod.…”

Section: Introductionmentioning

confidence: 99%

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

Yang,

Zhang,

Liu

et al. 2023

Mater. Res. Express

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Titanium alloy radiation rods have excellent physical and chemical properties compared to other materials, and are commonly used for ultrasonic casting of 2A14 aluminum alloy. However, titanium alloys are chemically corroded in high-temperature aluminum melts for a long time, making it difficult to precisely regulate the elemental composition during casting. In order to better understand the high-temperature chemical corrosion mechanism of titanium alloy radiation rods, this research looks into the corrosion morphology, weight loss, surface roughness, and reaction layer. The study's findings suggest that the rate of chemical corrosion of titanium alloy in high-temperature aluminum melt is often inversely correlated with the degree of roughness, with the degree of roughness changing nonlinearly during the corrosion process. Titanium alloy weight loss rates with roughness Ra0.4μm, Ra7.2μm, Ra9.5μm and Ra9.8μm are 0.16mg per minute, 0.25mg per minute, 0.37mg per minute and 0.29mg per minute, respectively. The corrosion product of the chemical corrosion process is TiAl3, which is granular. Under varying roughness conditions, the solid-liquid interface of Al/Ti emerges reactants after 4 minutes, and the TiAl3 reaction layer arises after 12 minutes. Furthermore, the reaction layer with little roughness is flat and compact, whereas the reaction layer with great roughness is loose and contains many faults. At the same time, the growth rate of the reaction layer decreases slightly. And the greater the surface roughness, the greater the TiAl3 reaction layer grows at the titanium alloy matrix.

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Effect of Ultrasonic‐Assisted Treatment on Microstructure and Mechanical Properties of Laser Deposition Repairing AlSi7Mg Alloy

Yi,

Sun,

Cui

et al. 2024

Adv Eng Mater

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The study focusing on the repairing technology with highly efficient and high quality for aerospace aluminum alloy parts is of great necessity and application significance. Herein, laser deposition repairing (LDR) technology with and without ultrasonic‐assisted treatment is employed to repair the AlSi7Mg alloy. The morphological analysis results show that ultrasonic‐assisted treatment laser deposition repairing (UT‐LDR) can significantly refine the grain, reduce the porosity, and provide dislocation strengthening of repaired zone (RZ). The microhardness of RZ is higher than that of the base material due to the strengthening effect of fine grain. The microhardness of RZ further increases by 27.7% under the action of ultrasound. With the introduction of ultrasound, tensile strength of repaired samples increases from 180.9 to 241.7 MPa, but the elongation decreases from 4.0% to 1.8%. Both LDR and UT‐LDR samples show brittle fracture mechanism with tiny dimples and obvious cleavage planes.

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A novel method and mechanism for simultaneously refining microstructure and controlling grain orientation in Ti48Al2Cr2Nb2.5C alloy

Cited by 5 publications

References 18 publications

Carbon in Commercially Pure Titanium

Carbon in Commercially Pure Titanium

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

Effect of Ultrasonic‐Assisted Treatment on Microstructure and Mechanical Properties of Laser Deposition Repairing AlSi7Mg Alloy

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