Study of mechanical and metallurgical properties of Hastelloy X at cryogenic condition

Pavithra, E.

doi:10.1016/j.jmrt.2019.10.048

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…The optimal level of each factor is determined based on the average value ̅ k. The numbers outside the brackets represent the optimal level, while the numbers inside the brackets represent the suboptimal level with decreasing priority. For groove width, the optimal combination is obtained as A1(2)B4(3)C1D4(3)E1 (2,3,4), and for stability, the optimal level combination is A4(3,2)B3C4(2,3) D1(2,3)E4(3). For factor A, level 1 and 4 are not good enough to meet the processing needs, choose both common suboptimal level 2, when the groove width is increased by 12.21% compared to level 1, and the number of short circuits is reduced by 36.36%.…”

Section: Resultsmentioning

confidence: 99%

“…Hastelloy X (HX) is a solid solution strengthened nickel-based superalloy with high strength, strong corrosion resistance and excellent high temperature mechanical properties. 1,2 It is widely used in aerospace and other fields where a large number of structures such as micro-grooves and cavities are required. 3,4 Selective laser melting (SLM) is a typical additive manufacturing (AM) technique in which metal powders are selectively melted and stacked layer by layer to directly fabricate complex metal structures.…”

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confidence: 99%

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Ultrasonic-Assisted Electrochemical Milling of SLM-Printed Hastelloy X Based on Analysis of Material Passivation Characteristics

Guan¹,

Liu²,

Shu³

et al. 2022

J. Electrochem. Soc.

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Hastelloy X (HX) is widely used in the aerospace field for its excellent corrosion resistance and high-temperature mechanical properties that can be fabricated into complex structures directly via the selective laser melting (SLM) technique. However, SLM-printed (SLM-ed) HX with high strength and hardness is challenging to process using conventional manufacturing techniques and may result in machining flaws that do not fulfill engineering standards. Therefore, an ultrasonic-assisted electrochemical milling (UAECM) method using a tube electrode is proposed to fabricate high aspect ratio structures on SLM-ed HX with high-quality. First, the passivation characteristics of SLM-ed HX before and after solid solution treatment were investigated using polarization curves and electrochemical impedance spectroscopy. The electrochemical milling process and the electrode gap flow field were then simulated andthe effect of processing parameters such as ultrasonic amplitude, electrical parameters, and mechanical parameters on the groove width and stability was investigated by torthogonal and single factor experiments. Finally, the cavity and bump structures were machined by layered milling with an average groove width of 960±15µm, a groove depth of 4.4 mm, an aspect ratio of 4.5, and surface roughness of 1.524 and 1.622 µm, respectively, demonstrating the adaptability and machining accuracy of the UAECM method.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Ultrasonic-Assisted Electrochemical Milling of SLM-Printed Hastelloy X Based on Analysis of Material Passivation Characteristics

Guan¹,

Liu²,

Shu³

et al. 2022

J. Electrochem. Soc.

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“…As the soaking period increased, the grains become finer. 140 Oteyaka et al in their research showed that the hardness of AZ91 under DCT increased from 63HV to 75HV. The hardness was higher in DCT with 6 h than 4 h and 5hrs.…”

Section: Hardnessmentioning

confidence: 96%

Effect of cryogenic treatment on properties of materials: A review

Singh

Pandey

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The objective of this review paper is to introduce Cryogenic temperature effect on different properties of materials. Results showed that cryogenic operation improves properties like hardness, fatigue strength, tensile strength, toughness and resistance to wear in comparison to conventional operations. The improvement is a result of microstructural changes at cryogenic temperature which helps in conversion of austenite to martensite and carbide nucleation. The results also showed that doing tempering before or after cryogenic operation has significant influence on material properties which helps to achieve better carbide distribution. Different heat treatment sequences which involve tempering before or after Deep Cryogenic Treatment (DCT), provides varied results. Soaking time at cryogenic temperature also has an important role in refinement of microstructure and affect material properties.

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“…Ni-based alloy Inconel: 200 [443], 600 [444,445], 617 [446], 625 [447][448][449], 690 [450], 800 [451], 800H [452][453][454] Hastelloy C276 [455], C22 [456,457], X [458] Fatigue, surface roughness, machinability, durability, impact toughness, microhardness, and tensile strength In all energy sectors Other alloys HEA [459] W-based alloys [460] Cu-based alloys [461] Ti-based alloys Ti6Al4V [451,462] Microhardness, compressive strength, and plasticity…”

Section: Effect Of Cryogenic Treatments On Metallic Materials Potenit...mentioning

confidence: 99%

Sustainable New Technology for the Improvement of Metallic Materials for Future Energy Applications

Jovičević-Klug,

Rohwerder

2023

Coatings

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The need for a more sustainable and accessible source of energy is increasing as human society advances. The use of different metallic materials and their challenges in current and future energy sectors are the primary focus of the first part of this review. Cryogenic treatment (CT), one of the possible solutions for an environmentally friendly, sustainable, and cost-effective technology for tailoring the properties of these materials, is the focus of second part of the review. CT was found to have great potential for the improvement of the properties of metallic materials and the extension of their service life. The focus of the review is on selected surface properties and corrosion resistance, which are under-researched and have great potential for future research and application of CT in the energy sector. Most research reports that CT improves corrosion resistance by up to 90%. This is based on the unique oxide formation that can provide corrosion protection and extend the life of metallic materials by up to three times. However, more research should be conducted on the surface resistance and corrosion resistance of metallic materials in future studies to provide standards for the application of CT in the energy sector.

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Study of mechanical and metallurgical properties of Hastelloy X at cryogenic condition

Cited by 12 publications

References 15 publications

Ultrasonic-Assisted Electrochemical Milling of SLM-Printed Hastelloy X Based on Analysis of Material Passivation Characteristics

Ultrasonic-Assisted Electrochemical Milling of SLM-Printed Hastelloy X Based on Analysis of Material Passivation Characteristics

Effect of cryogenic treatment on properties of materials: A review

Sustainable New Technology for the Improvement of Metallic Materials for Future Energy Applications

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