A comparative study on determination method of heat transfer coefficient using inverse heat transfer and iterative modification

Sugianto, Arif; Narazaki, Michiharu; Kogawara, Minoru; Shirayori, Atsushi

doi:10.1016/j.jmatprotec.2008.10.016

Cited by 32 publications

(10 citation statements)

References 3 publications

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“…3. Figure 4a, experimentation [1][2][3][4][5][6][7] justifying the method of calculation. As the water near the metal piece is above 100°C, except for the 10 mm square, vapour blanket exists beyond 200 s for other samples.…”

Section: Resultsmentioning

confidence: 87%

“…Moreover, experimentation is time consuming and data for a metal-quenchant combination cannot be applied for the actual workpiece with thickness variations. Arif Sugianto et al [1] studied the determination of quenching technique, to reduce the distortion of steel parts during heat treatment. Temperature dependent heat transfer coefficient was determined for a cylindrical part by lumped heat capacity method and inversion heat transfer method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Analysis of Heat Transfer During Quenching Process

Madireddi

Krishnan

Reddy

2016

J. Inst. Eng. India Ser. C

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A numerical model is developed to simulate the immersion quenching process of metals. The time of quench plays an important role if the process involves a defined step quenching schedule to obtain the desired characteristics. Lumped heat capacity analysis used for this purpose requires the value of heat transfer coefficient, whose evaluation requires large experimental data. Experimentation on a sample work piece may not represent the actual component which may vary in dimension. A FluidStructure interaction technique with a coupled interface between the solid (metal) and liquid (quenchant) is used for the simulations. Initial times of quenching shows boiling heat transfer phenomenon with high values of heat transfer coefficients (5000-2.5 9 10 5 W/m 2 K). Shape of the work piece with equal dimension shows less influence on the cooling rate Non-uniformity in hardness at the sharp corners can be reduced by rounding off the edges. For a square piece of 20 mm thickness, with 3 mm fillet radius, this difference is reduced by 73 %. The model can be used for any metalquenchant combination to obtain time-temperature data without the necessity of experimentation.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Heat Transfer During Quenching Process

Madireddi

Krishnan

Reddy

2016

J. Inst. Eng. India Ser. C

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“…The effect of heating temperature can be seen from below figures. Results show that for sample temperature of 300°C and also for 500°C the HTC values for surface facing up is higher as compared to surface facing down and side [6] [7] and [8].…”

Section: Resultsmentioning

confidence: 99%

Correlation of heat transfer coefficient in quenching process using ABAQUS

Davare¹,

Balachandran²,

Singh³

2018

AIP Conference Proceedings

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Abstract. During the heat treatment by quenching in a liquid medium the convective heat transfer coefficient plays a crucial role in the extraction of heat. The heat extraction ultimately influences the cooling rate and hence the hardness and mechanical properties. A Finite Element analysis of quenching a simple flat copper sample with different orientation of sample and with different quenchant temperatures were carried out to check and verify the results obtained from the experiments. The heat transfer coefficient (HTC) was calculated from temperature history in a simple flat copper disc sample experimentally. This HTC data was further used as input to simulation software and the cooling curves were back calculated. The results obtained from software and using experimentation shows nearly consistent values.

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“…With this method, temperature-time curves of the probe are acquired and used to inversely calculate HTC in terms of probe surface temperature (Funatani et al, 1999). This method, called lumped heat capacity method (Sugianto et al, 2008) assumes that the thermal resistance of the probe (body) is negligible in comparison with the resistance of the surrounding environment and therefore its temperature distribution is uniform during quenching. Accordingly, it is usually required to make the probe very small, or in some cases, the probe is made of material with high thermal conductivity like silver (Sugianto et al, 2008) so that the temperature of the probe is uniform during quenching in order to calculate HTC inversely (Sedighi and McMahon, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a better approach to obtain HTC for a real part would need to perform experiments with the actual part, acquire temperature-time curves at different locations of the part, and then iteratively determine the HTC data at different locations from the acquired cooling curves. Recently, some work has been done with such an approach using FEA package ABAQUS and optimization package iSIGHT (Li and Allison, 2007) or FEA package Deform-HT (Sugianto et al, 2008) to determine HTC iteratively.…”

Section: Introductionmentioning

confidence: 99%