A direct resistance heating method for shaped blank

Demazel, Nathan; Laurent, Hervé; Carin, Muriel; Masson, Philippe; Salmon-Legagneur, H.

doi:10.1016/j.jmapro.2020.12.056

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Multi-zoned SRE heating requires independent power control for different areas. The previous research [8] adopted a multiple power supply system to achieve differential heating of diverse rectangular areas. Here a single power multi-channel voltage control system is used.…”

Section: Multi-channel Power Control Systemmentioning

confidence: 99%

“…Behrens and Hübner [7] presented a similar technology that utilises the external resistance element to convert the original non-rectangular shape into several rectangles. Demazel et al [8] reported a further methodology, which applied the minimum complemental material to form rectangles, and each rectangle was controlled by an individual power source that was connected with the corresponding electrode pair. The above research provided inspiring research ideas for the uniform SRE heating of FRP irregular parts.…”

Section: Introductionmentioning

confidence: 99%

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A Multi-Zoned Self-Resistance Electric Heating Method for Curing Irregular Fiber Reinforced Composite Parts

Liu

Shen

et al. 2021

Advances in Transdisciplinary Engineering

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Fibre Reinforced Polymers (FRP) have been widely applied in various industries due to their outstanding properties. As a promising curing technology for FRP parts, the self-resistance electric (SRE) heating method has attracted plenty of attention. However, it is difficult for the SRE heating method to uniformly cure the FRP parts with irregular structures. In this paper, a multi-zoned SRE heating method is proposed, in which the FRP part is divided into several heating zones and the temperature of each zone is regulated independently. A multi-channel electrical voltage control system is developed to realise the multi-zoned SRE heating of a wing-shaped FRP part, in which a rapid zone-based temperature control responsiveness is achieved, and the maximum temperature difference is reduced from 60 °C to less than 10 °C, reaching 2.5 °C at its best. This work presents an alternative for the high efficiency and energy-saving curing process of FRP parts.

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Section: Multi-channel Power Control Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Multi-Zoned Self-Resistance Electric Heating Method for Curing Irregular Fiber Reinforced Composite Parts

Liu

Shen

et al. 2021

Advances in Transdisciplinary Engineering

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“…There are various high-energy sources for the rapid thermal processing of steel. These sources include laser beam energy [3], microwave energy [4], direct electric resistance heating [5], direct flame impingement heating [6], and induction heating [7,8]. Flash heating (FH) processing is an innovative heat treatment for annealing and tempering.…”

Section: Introductionmentioning

confidence: 99%

Impact of Ultra-Flash Tempering Treatment on the Microstructure and Mechanical Properties of High-Strength Carbon Steel

Hamada,

Jaskari,

Ali

et al. 2023

MSF

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A novel high-frequency induction technology was successfully developed to carry out ultra-flash tempering treatment (UFTT) of high-strength carbon steel (HS-CS) with a heating rate of 1000 °C/s. The as-received HS-CS is a fully martensitic structure with low toughness. UFTT strategy at various temperatures is proposed to produce a tempered martensitic lath structure with promoting carbide precipitates in this structure. Microstructure evolution during UFTT was characterized using secondary electron imaging and electron backscatter diffraction technique in a scanning electron microscope. Micro-indentation hardness tests were measured through the cross-section of the steel to analyze the impact extent of UFTT. The mechanical properties were measured by uniaxial tensile tests. The results revealed that UFTT at various temperatures (550-650 °C) significantly affected the microstructure and the mechanical strength of the steel. A fully tempered martensitic microstructure with various types of carbide precipitates was promoted. Although, the microhardness and tensile strength of flash-tempered steel decreased owing to the breakdown of lath and dislocation structure in the achieved microstructure by UFTT. Hence, it is expected that the promoted microstructure during UFTT in the tested steel will result in a superior strength-toughness synergy. Based on the achieved results, the UFTT technique provides an alternative route for the conventional processing to tailor the microstructure of microalloyed HS-CS, consequently, optimizing the mechanical performance. Meanwhile, Economically, it is a cost-effective route to manufacture advanced high-strength steel.

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“…By utilizing multiple independent power generators, the heating power could be independently controlled according to the length of each rectangle. To minimize the compensational material usage, Demazel et al [21] proposed a solution where the part was split into several rectangular strips heated by multiple generators, and they optimized the orientation and dimensions of rectangular strips to reduce the material and energy usage. The above MZC methods achieved uniform SRE heating of shaped parts with lower energy consumption and material usage compared to the IC methods.…”

mentioning

confidence: 99%

Self-resistance electric heating of shaped CFRP laminates: temperature distribution optimization and validation

Shen

Lü²,

Liu³

et al. 2022

Int J Adv Manuf Technol

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The Self-Resistance Electrical (SRE) heating method to cure carbon fiber reinforced polymer (CFRP) part possesses the advantages of rapid and volumetric heating, low energy consumption, and low asset investment. But the current SRE heating methods are difficult to uniformly cure the shaped CFRP parts due to the non-uniformly distributed Joule heat power in the parts with a varying cross-sectional area. In this paper, an optimized multi-zone SRE heating method is proposed, in which the uniform heating and curing process of the shaped CFRP part is firstly achieved. By optimizing the orientation of the rectangular zones, the local overheating caused by the voltage gradient and current diffusion between different zones is notably suppressed. Combined with the electro-thermal numerical analysis, the influence of the positional offset of electrodes in two adjacent zones on the temperature uniformity is investigated. Based on this, an automated zoning algorithm and the prioritizing method of the zone orientation are established. The proposed method is numerically and experimentally validated with the typical shaped CFRP parts, and the results are compared with that of the existing SRE heating method. The proposed method realizes that the maximum in-plane temperature difference of shaped CFRP parts is reduced by more than 80%. This method significantly improves the temperature uniformity of shaped CFRP parts during the multi-zone SRE heating process, which provides a potential solution for high-quality and efficient curing of CFRP parts.

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A direct resistance heating method for shaped blank

Cited by 7 publications

References 28 publications

A Multi-Zoned Self-Resistance Electric Heating Method for Curing Irregular Fiber Reinforced Composite Parts

A Multi-Zoned Self-Resistance Electric Heating Method for Curing Irregular Fiber Reinforced Composite Parts

Impact of Ultra-Flash Tempering Treatment on the Microstructure and Mechanical Properties of High-Strength Carbon Steel

Self-resistance electric heating of shaped CFRP laminates: temperature distribution optimization and validation

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