A study of hot deformation behavior and microstructural characterization of Mo–TZM alloy

Majumdar, S.; Kapoor, R.; Raveendra, S. T.; Sinha, H. N.; Samajdar, I.; Bhargava, Parag; Chakravartty, J.K.; Sharma, I.G.; Suri, A.K.

doi:10.1016/j.jnucmat.2008.12.049

Cited by 48 publications

(10 citation statements)

References 40 publications

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“…Molybdenum TZM alloys are highly desirable for a wide range of critical applications due to their high electrical and thermal conductivity, strength and creep resistance at elevated temperatures, high temperature stability, low coefficient of thermal expansion and excellent corrosion resistance in liquid metals [1][2][3][4][5][6][7]. They are widely used in aerospace, power generation, nuclear and fusion reactors, and military, industrial and chemical applications, where these alloys are subjected to high temperatures, liquid metal corrosion and other aggressive environments [8].…”

Section: Introductionmentioning

confidence: 99%

Preparation and ductile-to-brittle transition temperature of the La-TZM alloy plates

Yang

Wang

et al. 2015

International Journal of Refractory Metals and Hard Materials

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Section: Introductionmentioning

confidence: 99%

Preparation and ductile-to-brittle transition temperature of the La-TZM alloy plates

Yang

Wang

et al. 2015

International Journal of Refractory Metals and Hard Materials

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“…With the rapid development of aerospace, national defense and the military industry, electronics, and so on, increasing attention has been paid to the research and application of refractory metals [1][2][3][4]. Molybdenum and molybdenum-based alloys have a high melting point (2620 • C), good high-temperature mechanical properties and high conductivity and thermal conductivity, and are widely used in high-temperature structures [5][6][7][8][9][10]. However, the alloys have a poor oxidation resistance, and the "Pesting oxidation" at 400-800 • C and oxidation decomposition above 1000 • C are the main factors that limit their application [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

Shen

Zhang

et al. 2022

Coatings

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Molybdenum and its alloys, with high melting points, excellent corrosion resistance and high temperature creep resistance, are a vital high-temperature structural material. However, the poor oxidation resistance at high temperatures is a major barrier to their application. This work provides a summary of surface modification techniques for Mo and its alloys under high-temperature aerobic conditions of nearly half a century, including slurry sintering technology, plasma spraying technology, chemical vapor deposition technology, and liquid phase deposition technology. The microstructure and oxidation behavior of various coatings were analyzed. The advantages and disadvantages of various processes were compared, and the key measures to improve oxidation resistance of coatings were also outlined. The future research direction in this field is set out.

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“…Hot deformation is an essential way not only to reach a fundamental understanding of the flow behaviour of materials at forming temperatures and strain rates, but also to determine the optimum conditions for industrial processing ( Ref 5,6). The temperature range is chosen based on the melting point of the material ( Ref 7).…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Modified Johnson–Cook and Arrhenius-Type Constitutive Models to Predict the Hot Deformation Behaviour of Molybdenum-Hafnium-Carbide Alloy

Safari

Imran

Weiß

2021

J. of Materi Eng and Perform

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Molybdenum alloys are commonly used as tool material for high-temperature deformation processes like forming or forging. For these types of application, the material has to withstand static load at elevated temperatures. To investigate the high-temperature performance of the material, uniaxial hot tensile tests were performed on a Mo-1.2% Hf-0.1% C alloy (MHC) over the temperature range of 1173-1473 K with intervals of 100 K and strain rates of 0.001, 0.01 and 0.1 s−1 up to the fracture of the specimen. The flow stress decreases with increase in temperature and the reduction in strain rate. This behaviour could be related to the increasing rate of restoration mechanisms, i.e. dynamic recrystallization or recovery as well as to the decrease in the strain hardening rate. Microstructure of the two most critical hot deformation conditions were shown and compared. Based on modified Johnson–Cook and strain-compensated Arrhenius-type models, constitutive equations were established to predict the high-temperature flow stress of the respective MHC alloy. The accuracy of both models was evaluated by comparing the predicted stress values and the values obtained from experiments. Correlation coefficient, average absolute relative error, the number of material constants involved and the computational time required for evaluating the constants were calculated to quantify and compare the precision of both models. The flow stress values predicted by the constitutive equations are in good agreement with the experimental results. At lower strain rates (0.001 and 0.01 s−1), distinct deviation from the experimental results can be observed for the modified Johnson–Cook model. Despite the longer evaluation time and the larger number of material constants, the deformation behaviour, tracked by the Arrhenius-type model is more accurate throughout the entire deformation process.

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A study of hot deformation behavior and microstructural characterization of Mo–TZM alloy

Cited by 48 publications

References 40 publications

Preparation and ductile-to-brittle transition temperature of the La-TZM alloy plates

Preparation and ductile-to-brittle transition temperature of the La-TZM alloy plates

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

A Comparative Study on Modified Johnson–Cook and Arrhenius-Type Constitutive Models to Predict the Hot Deformation Behaviour of Molybdenum-Hafnium-Carbide Alloy

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