Control of Grain Refinement of A356 Aluminum Alloy by Computer Aided Cooling Curve Analysis

2015 ◽  
pp. 119-127
Author(s):  
A. Sharifi ◽  
N. Arab
Keyword(s):  
Aluminum Alloy ◽  
Grain Refinement ◽  
Curve Analysis ◽  
Cooling Curve ◽  
A356 Aluminum Alloy ◽  
Cooling Curve Analysis ◽  
Computer Aided ◽  
A356 Aluminum

Modification Effects of Sb on Al7SiMg Alloy Measured with Cooling Curve Analysis

2016 ◽  
Vol 879 ◽  
pp. 2113-2118 ◽  
Author(s):  
Shu Sen Wu ◽  
Meng Jie Lü ◽  
Jian Xun Chen ◽  
You Wu Mao ◽  
Shu Lin Lü
Keyword(s):  
Thermal Analysis ◽  
Growth Temperature ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Eutectic Solidification ◽  
Microstructure Observation ◽  
Modification Effect ◽  
Cooling Curve Analysis ◽  
Computer Aided ◽  
Eutectic Si

The modification mechanism of Sb on eutectic Si phase of Al-Si alloys was not understood very well. In this paper the modification effects of Sb on Al7SiMg alloy were investigated by computer aided cooling curve thermal analysis coupled with microstructure observation. The results show that the addition of Sb with 0.1%~0.25% amount has refining effect on eutectic Si phase, and this modification effect can be recorded by the cooling curve. The addition of Sb decreases the growth temperature of the eutectic solidification (TEG) by 5.0 °C to 7.8 °C, and this indicates that there is an undercooling effect with Sb modification. Moreover, faster cooling rate can obtain more superior morphology of eutectic Si, which can be changed from short rod to nearly granular particles. The morphology of eutectic Si is nearly unchanged with holding time extending from 0.5h to 2.5h, which means Sb has long modification effect for Al-Si alloys.

scholarly journals Grain size control in al-4.8 wt.% Cu alloy by computeraided cooling curve analysis

2014 ◽  
Vol 20 (3) ◽  
pp. 183-190
Author(s):  
Mehdi Dehnavi ◽  
Mohsen Haddad Sabzevar
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Size Control ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Cu Alloy ◽  
Master Alloys ◽  
Cooling Curve Analysis ◽  
Grain Size Control ◽  
Casting Industry

Generally Al–Ti and Al–Ti–B master alloys are added to the aluminium alloys for grain refinement. The cooling curve analysis (CCA) has been used extensively in metal casting industry to predict microstructure constituents, grain refinement and to calculate the latent heat of solidification. The aim of this study was to investigate the effect of grain refinement on the grain size of Al-4.8 wt.%Cu alloy by cooling curve analysis. To do this, alloy was grain refined by different amount of Al-5Ti-1B master alloy and all samples were solidified at constant cooling rate of 0.19 ℃/s. The temperature of the samples was recorded using a K thermocouple and a data acquisition system connected to a PC. The results show that the segregating power of Ti is very high and it segregates to the nucleant–liquid interface which leads to constitutional supercooling within which other nucleant particles get activated for nucleation. Other results show that with considering the changes in the primary undercooling (ΔTRU) as the main factor to determine the effectiveness of grain refinement process, it was found that by grain refinement, the value of undercooling decrease was approximately zero. 

scholarly journals Cooling curve analysis in binary Al-Cu alloys: Part II- Effect of Cooling Rate and Grain Refinement on The Thermal and Thermodynamic Characteristics

10.30544/81 ◽  
2015 ◽  
Vol 21 (3) ◽  
pp. 207-222 ◽  
Author(s):  
Mehdi Dehnavi ◽  
Mohsen Haddad-Sabzevar ◽  
Mohamad Hasan Avazkonnadeh-Gharavol
Keyword(s):  
Cooling Rate ◽  
Grain Refinement ◽  
Latent Heat ◽  
Thermodynamic Characteristics ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Cu Alloys ◽  
Master Alloys ◽  
Cooling Curve Analysis ◽  
Casting Industry

The Al-Cu alloys have been widely used in aerospace, automobile, and airplane applications. Generally Al–Ti and Al–Ti–B master alloys are added to the aluminium alloys for grain refinement. The cooling curve analysis (CCA) has been used extensively in metal casting industry to predict microstructure constituents, grain refinement and to calculate the latent heat of solidification. The aim of this study is to investigate the effect of cooling rate and grain refinement on the thermal and thermodynamic characteristics of Al-Cu alloys by cooling curve analysis. To do this, Al-Cu alloys containing 3.7, and 4.8 wt.% Cu were melted and solidified with 0.04, 0.19, 0.42, and 1.08 K/s cooling rates. The temperature of the samples was recorded using a K thermocouple and a data acquisition system connected to a PC. Some samples were Grain refined by Al-5Ti-1B to see the effect of grain refinement on the aforementioned properties. The results show that, in a well refined alloy, nucleation will occur in a shorter time, and a undercooling approximately decreases to zero. The other results show that, with considering the cooling rate being around 0.1 °C/s, the Newtonian method is efficient in calculating the latent heat of solidification.

Computer aided cooling curve analysis (CACCA) of ADC-12 alloy

2021 ◽  
Author(s):  
Athul V. Anil ◽  
Vijeesh Vijayan ◽  
B. Sachin ◽  
Prithvi Kumar Rai ◽  
Muralidhara Rao
Keyword(s):  
Curve Analysis ◽  
Cooling Curve ◽  
Cooling Curve Analysis ◽  
Computer Aided
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