Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal

Translated title of the contribution: Thermodynamic modelling of Al-Si-Cu Alloys for semisolid metal processsing)

M. S. Salleh, Mohd. Zaidi Omar, J. Syarif, M. N. Mohammed

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Thixoforming is a new technology in producing near net-shape products in semisolid state. This process can reduce macrosegregation, porosity and involve low forming forces. Currently, there are a few grades of aluminum alloys such as A319, A356 and A357 commonly used in semi-solid metal processing. Therefore, there is a demand to widen the range of aluminum alloys specially tailored for semisolid metal processing. This study discusses the thermodynamic modelling to predict changes in the properties of aluminum alloy A319 expecially when the content of alloying elements such as copper, manganese and iron are varied in order to fulfill the criteria of semisolid metal processing. All the calculations in the present work were performed using Java-based Material Properties (JMatPro) commercial software. Thermodynamic calculation based on Scheil's equation is used to determine solidification temperature range (ΔT), liquid fraction sensitivity (dfL/dT) and processing window temperature (ΔT30/50). The thermodynamic calculation shows that the solidification temperatures have decreased from 130 to 113°C while the eutectic temperatures have increased from 510 to 515°C when the wt.% of copper, manganese and ferum were increased. The liquid fraction sensitivity is reduced from 0.017 to 0.007°C-1 and the processing window temperature is reduced from 26 to 24°C. Eutectics binary reactions occurred between 30 and 50% liquid fraction for all alloy groups. Phase diagram is used to identify the formation of intermetallic phase compound such as β-Al 5FeSi and Al2Cu in the alloys. The results indicate the suitability of these modified alloys as potential materials for semisolid processing.

Original languageUndefined/Unknown
Pages (from-to)791-798
Number of pages8
JournalSains Malaysiana
Volume43
Issue number5
Publication statusPublished - 2014

Fingerprint

Thermodynamics
Processing
Metals
Aluminum alloys
Eutectics
Manganese
Solidification
Liquids
Temperature
Copper
Alloying elements
Intermetallics
Phase diagrams
Materials properties
Porosity
Iron

Keywords

  • Liquid fraction sensitivity
  • Processing window temperature
  • Solidification temperature range
  • Thermodynamic calculation
  • Thixoforming

ASJC Scopus subject areas

  • General

Cite this

Salleh, M. S., Omar, M. Z., Syarif, J., & Mohammed, M. N. (2014). Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal. Sains Malaysiana, 43(5), 791-798.

Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal. / Salleh, M. S.; Omar, Mohd. Zaidi; Syarif, J.; Mohammed, M. N.

In: Sains Malaysiana, Vol. 43, No. 5, 2014, p. 791-798.

Research output: Contribution to journalArticle

Salleh, MS, Omar, MZ, Syarif, J & Mohammed, MN 2014, 'Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal', Sains Malaysiana, vol. 43, no. 5, pp. 791-798.
Salleh, M. S. ; Omar, Mohd. Zaidi ; Syarif, J. ; Mohammed, M. N. / Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal. In: Sains Malaysiana. 2014 ; Vol. 43, No. 5. pp. 791-798.
@article{35f47c469eff42acbc727ee78a5fdd49,
title = "Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal",
abstract = "Thixoforming is a new technology in producing near net-shape products in semisolid state. This process can reduce macrosegregation, porosity and involve low forming forces. Currently, there are a few grades of aluminum alloys such as A319, A356 and A357 commonly used in semi-solid metal processing. Therefore, there is a demand to widen the range of aluminum alloys specially tailored for semisolid metal processing. This study discusses the thermodynamic modelling to predict changes in the properties of aluminum alloy A319 expecially when the content of alloying elements such as copper, manganese and iron are varied in order to fulfill the criteria of semisolid metal processing. All the calculations in the present work were performed using Java-based Material Properties (JMatPro) commercial software. Thermodynamic calculation based on Scheil's equation is used to determine solidification temperature range (ΔT), liquid fraction sensitivity (dfL/dT) and processing window temperature (ΔT30/50). The thermodynamic calculation shows that the solidification temperatures have decreased from 130 to 113°C while the eutectic temperatures have increased from 510 to 515°C when the wt.{\%} of copper, manganese and ferum were increased. The liquid fraction sensitivity is reduced from 0.017 to 0.007°C-1 and the processing window temperature is reduced from 26 to 24°C. Eutectics binary reactions occurred between 30 and 50{\%} liquid fraction for all alloy groups. Phase diagram is used to identify the formation of intermetallic phase compound such as β-Al 5FeSi and Al2Cu in the alloys. The results indicate the suitability of these modified alloys as potential materials for semisolid processing.",
keywords = "Liquid fraction sensitivity, Processing window temperature, Solidification temperature range, Thermodynamic calculation, Thixoforming",
author = "Salleh, {M. S.} and Omar, {Mohd. Zaidi} and J. Syarif and Mohammed, {M. N.}",
year = "2014",
language = "Undefined/Unknown",
volume = "43",
pages = "791--798",
journal = "Sains Malaysiana",
issn = "0126-6039",
publisher = "Penerbit Universiti Kebangsaan Malaysia",
number = "5",

}

TY - JOUR

T1 - Permodelan termodinamik Aloi Al-Si-Cu untuk pemprosesan logam separa pepejal

AU - Salleh, M. S.

AU - Omar, Mohd. Zaidi

AU - Syarif, J.

AU - Mohammed, M. N.

PY - 2014

Y1 - 2014

N2 - Thixoforming is a new technology in producing near net-shape products in semisolid state. This process can reduce macrosegregation, porosity and involve low forming forces. Currently, there are a few grades of aluminum alloys such as A319, A356 and A357 commonly used in semi-solid metal processing. Therefore, there is a demand to widen the range of aluminum alloys specially tailored for semisolid metal processing. This study discusses the thermodynamic modelling to predict changes in the properties of aluminum alloy A319 expecially when the content of alloying elements such as copper, manganese and iron are varied in order to fulfill the criteria of semisolid metal processing. All the calculations in the present work were performed using Java-based Material Properties (JMatPro) commercial software. Thermodynamic calculation based on Scheil's equation is used to determine solidification temperature range (ΔT), liquid fraction sensitivity (dfL/dT) and processing window temperature (ΔT30/50). The thermodynamic calculation shows that the solidification temperatures have decreased from 130 to 113°C while the eutectic temperatures have increased from 510 to 515°C when the wt.% of copper, manganese and ferum were increased. The liquid fraction sensitivity is reduced from 0.017 to 0.007°C-1 and the processing window temperature is reduced from 26 to 24°C. Eutectics binary reactions occurred between 30 and 50% liquid fraction for all alloy groups. Phase diagram is used to identify the formation of intermetallic phase compound such as β-Al 5FeSi and Al2Cu in the alloys. The results indicate the suitability of these modified alloys as potential materials for semisolid processing.

AB - Thixoforming is a new technology in producing near net-shape products in semisolid state. This process can reduce macrosegregation, porosity and involve low forming forces. Currently, there are a few grades of aluminum alloys such as A319, A356 and A357 commonly used in semi-solid metal processing. Therefore, there is a demand to widen the range of aluminum alloys specially tailored for semisolid metal processing. This study discusses the thermodynamic modelling to predict changes in the properties of aluminum alloy A319 expecially when the content of alloying elements such as copper, manganese and iron are varied in order to fulfill the criteria of semisolid metal processing. All the calculations in the present work were performed using Java-based Material Properties (JMatPro) commercial software. Thermodynamic calculation based on Scheil's equation is used to determine solidification temperature range (ΔT), liquid fraction sensitivity (dfL/dT) and processing window temperature (ΔT30/50). The thermodynamic calculation shows that the solidification temperatures have decreased from 130 to 113°C while the eutectic temperatures have increased from 510 to 515°C when the wt.% of copper, manganese and ferum were increased. The liquid fraction sensitivity is reduced from 0.017 to 0.007°C-1 and the processing window temperature is reduced from 26 to 24°C. Eutectics binary reactions occurred between 30 and 50% liquid fraction for all alloy groups. Phase diagram is used to identify the formation of intermetallic phase compound such as β-Al 5FeSi and Al2Cu in the alloys. The results indicate the suitability of these modified alloys as potential materials for semisolid processing.

KW - Liquid fraction sensitivity

KW - Processing window temperature

KW - Solidification temperature range

KW - Thermodynamic calculation

KW - Thixoforming

UR - http://www.scopus.com/inward/record.url?scp=84900433346&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84900433346&partnerID=8YFLogxK

M3 - Article

VL - 43

SP - 791

EP - 798

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 5

ER -