Characterization of the hot deformation microstructure of AISI 321 austenitic stainless steel

Ghazani, Mehdi Shaban; Eghbali, Beitallah

doi:10.1016/j.msea.2018.06.025

Cited by 52 publications

(36 citation statements)

References 24 publications

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“…The first experiments were conducted on workpieces produced from easy-to-process conductive materials with a low melting point. Workpieces with dimensions of 200 × 20 × 16 mm of sorted and gauged corrosion-resistant, heat-resistant, and high-temperature steel of 12KH18N10T grade (analogue of AISI 321, specifications by interstate standard GOST 5949-75) [83, 84, 85, 86, 87, 88] and 200 × 16 × 16 mm of D16 aluminium alloy (AlCu4Mg1, analogue of AISI 2024) [89, 90, 91, 92, 93, 94] were used.…”

Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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The productivity of electrical discharge machining (EDM) is relatively low owing to the natural laws of electrical erosion. Precise EDM demands uninterrupted control of the discharge gap and adjustment of process parameters. It is particularly critical for processing large workpieces with complex linear surfaces and for materials with threshold conductivities such as the new advanced ceramic nanocomposites Al2O3+TiC and Al2O3+SiCw+TiC(30–40%). In these cases, adequate flushing of erosion products is hampered by the geometry of the working space or by the small value of the required discharge gap, which does not exceed 2.2–2.5 μm. The methods of adaptive control in modern computer numerical control systems of EDM equipment based on measuring the electrical parameters in the working zone have been shown to be ineffective in the cases described above. This study aims to investigate the natural phenomena of material sublimation under discharge pulses for conductive ceramics and nanocomposites. The measured conductivities of the samples are higher than the percolation threshold. However, the question of machinability remains open owing to detected processing interruptions and poor quality of machined surfaces. New knowledge on EDM of conductive ceramics and nanocomposites can improve the final quality of the machined surfaces and productivity of the method by the introduction of advanced monitoring and control methods based on acoustic emissions. The manuscript presents an up-to-date overview and current state of the research on the subject area. The obtained morphology of the samples and discussion of the findings complete the experimental part of the study. The scientific basis for a new type of adaptive control system is provided. This can improve the effectiveness of parameter control for machining conductive ceramics and nanocomposites and contribute to an increase in the EDM performance for the most critical cases.

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Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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“…The cell structures of these dislocations are furnished with high dislocation density. The formation of dislocation cells during different strain rates and its effect on the flow behaviour of steel have been reported by many researchers [88][89][90][91][92][93][94]. Rajput et al [82] conducted hot compression tests on AISI 1060 steel in Gleeble 3800 simulator at strain rates from 0.01-80/s as well as at different temperatures under the vacuum of 1 pascal.…”

Section: Low Carbon Steelmentioning

confidence: 95%

Structure–Property Correlation and Constitutive Description of Structural Steels during Hot Working and Strain Rate Deformation

Prusty

Banerjee

2020

Materials

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The behaviour of plain carbon as well as structural steels is qualitatively different at different regimes of strain rates and temperature when they are subjected to hot-working and impact-loading conditions. Ambient temperature and carbon content are the leading factors governing the deformation behaviour and substructural evolution of these steels. This review aims at investigating the mechanical behaviour of structural (or constructional) steels during their strain rate (ranging from very low to very high) as well as hot-working conditions and subsequently establishing the structure–property correlation. Rate-dependent constitutive equations play a significant role in predicting the material response, particularly where the experiments are difficult to perform. In this article, an extensive review is carried out on the merits and limitations of constitutive models which are commonly used to model the deformation behaviour of plain carbon steels.

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“…This is because there is more time available for the formation and growth of precipitates at a lower strain rate. 27) The type of precipitates have be testified by the TEM observation, as shown in Figure. The pentagonal precipitate (shows in Fig. 6(a)) is about 500 nm.…”

Section: The Flow Behavior During Tot Deformationmentioning

confidence: 99%

Hot Deformation Characteristic and Optimization of Processing Parameters for 0.1C–18Cr–1Al–1Si Ferritic Heat Resistant Stainless Steel

et al. 2020

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The hot deformation behavior of 0.1C18Cr1Al1Si ferritic heat resistant stainless steel has been investigated in the temperature range of 9001100°C and the strain rate range of 0.011 s ¹1 employing compressive tests. The obtained results have shown that the volume fraction and average size of the AlN phases and (Cr,Fe) 23 C 6 carbides decrease with increasing strain rate. The deformation activation energy is calculated as 332.306 kJ•mol ¹1. Based on the analysis of processing map and microstructure, the optimum processing domain for hot deformation is confirmed as the temperature range of 10451100°C and strain rate range of 0.061 s ¹1 .

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Characterization of the hot deformation microstructure of AISI 321 austenitic stainless steel

Cited by 52 publications

References 24 publications

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Structure–Property Correlation and Constitutive Description of Structural Steels during Hot Working and Strain Rate Deformation

Hot Deformation Characteristic and Optimization of Processing Parameters for 0.1C–18Cr–1Al–1Si Ferritic Heat Resistant Stainless Steel

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