Influence of deformation strain rate on the mechanical response in a metastable β titanium alloy with various microstructures

Li, Cong; Like, Qin; Li, Ming; Xiao, Hui; Wang, Qi; Chen, Jian

doi:10.1016/j.jallcom.2019.152426

Cited by 25 publications

(9 citation statements)

References 18 publications

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“…Titanium and titanium alloys have been widely used in many industries, especially aerospace, energy, and biomedical industries, due to their high specific strength, excellent corrosion resistance, and good biocompatibility [1][2][3]. Laser additive manufacturing (LAM) is a transformative technology for the fabrication of near-net shape components [4][5][6], and it is becoming more and more popular for the fabrication or repair of titanium alloy components [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Song

Xie

et al. 2020

Materials

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Refining microstructure is an important issue for laser additive manufacturing (LAM) of titanium alloy. In the present work, the microstructures of LAM-fabricated Ti6Al4V alloy were refined using a low energy density with the combination of a small spot diameter, a low laser power, and a high scanning speed. The microstructure, hardness, wear performance, and molten pool thermal behavior of LAM-fabricated Ti6Al4V coatings were studied. The results show that the grain sizes of both prior β and α phases are strongly dependent on the cooling rate of the molten pool. The fine prior β grains and submicron-scale acicular α phases were obtained under a low energy density of 75 J mm−2 due to the high cooling rate of the molten pool. In addition, the as-fabricated Ti6Al4V sample with submicron-scale acicular α phase showed a very high hardness of 7.43 GPa, a high elastic modulus of 133.6 GPa, and a low coefficient of friction of 0.48. This work provides a good method for improving the microstructure and mechanical performance of LAM-fabricated Ti6Al4V alloy.

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Section: Introductionmentioning

confidence: 99%

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Song

Xie

et al. 2020

Materials

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“…Foam metal is expected to become a potential electrode material for lithium ion batteries due to its excellent properties such as high porosity, high specific surface area, and low bulk density. The excellent performance of porous metals in silencing, separation, filtration, heat exchange, electrochemical processes, and catalytic reaction engineering strongly depends on the structural morphology of surfaces and the specific surface area of porous materials [1][2][3][4][5]. Therefore, the determination of its specific surface area has increasingly attracted the attention of relevant scholars.…”

Section: Introductionmentioning

confidence: 99%

Calculation Method of Specific Surface Area of Foam Metal Based on an Ideal Tetradecahedron Model for Lithium Ion Battery

Chen

Zhang

et al. 2020

International Journal of Photoenergy

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A novel calculation method of specific surface area of tetrahedral foam metal is established. The expressions of the two basic parameters of the foam metal with respect to porosity and pore size are derived by using the geometrical relationship of this model; consequently, the specific surface area of the metal foam is easily calculated. The theoretical calculation data are compared with the experimental results; it shows that the specific surface area of various porous metals, such as nickel foam and copper foam prepared by electrodeposition and aluminum foam produced by high-pressure infiltration casting, can be well calculated by the formula proposed in this paper. Compared with other similar equations, the calculation results of this method possess lower deviation and greater practicability.

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“…However, the development of new technologies has improved the requirements of materials. For instance, the light-weight, wear resistance, and thermomechanical fatigue properties of composites for automotive brake discs are very important [2][3][4]. The traditional metal brake discs are easy to crack and cannot ensure the safety of the vehicles due to the high temperature produced by friction between wheel and rail with high driving speed (≥400 km/h).…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Fatigue Behavior of Spray-Deposited SiC_p/Al-Si Composite Applied in the High-Speed Railway Brake Disc

Chen

Zuo

et al. 2020

International Journal of Photoenergy

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The thermomechanical fatigue (TMF) behaviors of spray-deposited SiCp-reinforced Al-Si alloy were investigated in terms of the size of Si particles and the Si content. Thermomechanical fatigue experiments were conducted in the temperature range of 150-400°C. The cyclic response behavior indicated that the continuous cyclic softening was exhibited for all materials, and the increase in SiC particles size and Si content aggravated the softening degree, which was attributed to dislocation generation due to differential thermal contraction at the Al matrix/Si phase interface or Al matrix/SiC particle interface. Meanwhile, the TMF life and stress amplitude of SiCp/Al-7Si composites were greater than those of Al-7Si alloy, and increased with the increasing SiC particle size, which was associated with “load sharing” of the direct strengthening mechanism. The stress amplitude of 4.5μmSiCp/Al-Si composite increased as the Si content increased; however, the influence of Si content on the TMF life was not so significant. The TMF failure mechanism revealed that the crack mainly initiated at the agglomeration of small-particulate SiC and the breakage of large-particulate SiC, and the broken primary Si and the exfoliated eutectic Si accelerated the crack propagation.

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Influence of deformation strain rate on the mechanical response in a metastable β titanium alloy with various microstructures

Cited by 25 publications

References 18 publications

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Calculation Method of Specific Surface Area of Foam Metal Based on an Ideal Tetradecahedron Model for Lithium Ion Battery

Thermomechanical Fatigue Behavior of Spray-Deposited SiC_p/Al-Si Composite Applied in the High-Speed Railway Brake Disc

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Influence of deformation strain rate on the mechanical response in a metastable β titanium alloy with various microstructures

Cited by 25 publications

References 18 publications

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Calculation Method of Specific Surface Area of Foam Metal Based on an Ideal Tetradecahedron Model for Lithium Ion Battery

Thermomechanical Fatigue Behavior of Spray-Deposited SiCp/Al-Si Composite Applied in the High-Speed Railway Brake Disc

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Thermomechanical Fatigue Behavior of Spray-Deposited SiC_p/Al-Si Composite Applied in the High-Speed Railway Brake Disc