Application of cooling curve analysis in solidification pattern and structure control of grey cast irons

2018 ◽  
Vol 132 (2) ◽  
pp. 1017-1028 ◽  
Author(s):  
Iulian Riposan ◽  
Mihai Chisamera ◽  
Stelian Stan
Keyword(s):  
Curve Analysis ◽  
Cooling Curve ◽  
Cast Irons ◽  
Structure Control ◽  
Cooling Curve Analysis ◽  
Solidification Pattern ◽  
Grey Cast

The Study of Solidification Behavior in Cast Irons Using the Linear Displacement Method

2017 ◽  
Vol 263 ◽  
pp. 77-81
Author(s):  
Sarum Boonmee ◽  
Letrit Chuencharoen
Keyword(s):  
Linear Expansion ◽  
Linear Displacement ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Carbon Equivalent ◽  
Solidification Behavior ◽  
Displacement Method ◽  
Solidification Shrinkage ◽  
Cast Irons ◽  
Cooling Curve Analysis

This study aims to assess the solidification shrinkage and expansion during the solidification of cast irons. The solidification shrinkage and expansion in cast irons are due to the formation of austenite and graphite respectively. In this study, the linear displacement method was used to observe the solidification event combined with the cooling curve analysis. It was found that the cooling and displacement curves show good correlations in time of events during solidification. The displacement due to graphite expansion increased with the carbon equivalent. The linear expansion of 0.2 to 1.9 mm was observed for the carbon equivalents ranged from 3.7 to 4.5. On the other hand, the displacement due to the austenite shrinkage was found to decrease with increasing carbon equivalents.

Determination of the latent heat of fusion and solid fraction evolution of metals and alloys by an improved cooling curve analysis method

2019 ◽  
Vol 140 (4) ◽  
pp. 1825-1836 ◽  
Author(s):  
Carlos González-Rivera ◽  
Anthony Harrup ◽  
Carla Aguilar ◽  
Adrián M. Amaro-Villeda ◽  
Marco A. Ramírez-Argáez
Keyword(s):  
Latent Heat ◽  
Solid Fraction ◽  
Metals And Alloys ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Heat Of Fusion ◽  
Analysis Method ◽  
Latent Heat Of Fusion ◽  
Cooling Curve Analysis

scholarly journals Ce-Bearing FeSi Alloy Inoculation of Electrically Melted, Low Sulphur Grey Cast Irons for Thin Wall Castings

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1122
Author(s):  
Irina Varvara Balkan ◽  
Iulian Riposan
Keyword(s):  
Wall Thickness ◽  
Structural Characteristics ◽  
Cooling Curve ◽  
Thin Wall ◽  
Cast Irons ◽  
Iron Castings ◽  
Grey Cast ◽  
The Difference ◽  
Thermal Cooling ◽  
Fesi Alloy

Electrically melted and over-heated (>1500 °C) grey cast iron at less than 0.04%S, as commonly used, solidifies large amounts of carbides and/or undercooled graphite, especially in thin wall castings; this is necessary to achieve a stronger inoculation. The efficiency of Ce-bearing FeSi alloy is tested for lower ladle addition rates (0.15 and 0.25 wt.%), compared to the base and conventional inoculated iron (Ba,Ca-bearing FeSi alloy). The present work explores chill and associated structures in hypoeutectic grey iron (3.6–3.8%CE, 0.02%S, (%Mn) × (%S) = 0.013–0.016, Alres < 0.002%), in wedge castings W1, W2 and W3 (ASTM A 367, furan resin sand mould), at a lower cooling modulus (1.1–3.5 mm) that is typically used to control the quality of thin wall iron castings. Relatively clear and total chill well correlated with the standard thermal (cooling curve) analysis parameters and structural characteristics in wedge castings, at different wall thickness, displayed as the carbides/graphite ratio and presence of undercooled graphite morphologies. The difference in effects of the two inoculants addition is seen as the ability to decrease the amount of carbides and undercooled graphite, with Ce-bearing FeSi alloy outperforming the conventional inoculant, especially as the wall thickness decreased. It appears that Ce-bearing FeSi alloy could be a solution for low sulphur, electric melt, thin wall iron castings production.

Characterization of the solidification path of AlSi5Cu(1–4 wt.%) alloys using cooling curve analysis

JOM ◽  
2011 ◽  
Vol 63 (11) ◽  
pp. 51-57 ◽  
Author(s):  
Mile B. Djurdjevic ◽  
Zoran Odanovic ◽  
Nadezda Talijan
Keyword(s):  
Solidification Path ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Cooling Curve Analysis

Thermal Analysis of Aluminum Alloys

2019 ◽  
Author(s):  
Daniel Larouche
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Quality Control ◽  
Aluminum Alloys ◽  
Isothermal Calorimetry ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Scanning Calorimetry ◽  
Cooling Curve Analysis ◽  
Scientists And Engineers

Thermal analysis is applied on aluminum alloys by researchers to investigate mainly phase transformations, while it is regularly used for quality control purposes in industry. Techniques like cooling curve analysis, differential thermal analysis, differential scanning calorimetry, and isothermal calorimetry are amongst those most frequently used by scientists and engineers. These techniques will be described, and a mathematical description of the results will be developed. State-of-the-art quantification methods applied on aluminum alloys will be presented and criticized based on specific examples taken from the literature.

Cooling: Curve Analysis

2016 ◽  
pp. 854-873 ◽  
Author(s):  
Bernardo Hernández-Morales
Keyword(s):  
Curve Analysis ◽  
Cooling Curve ◽  
Cooling Curve Analysis

Cooling Curve Analysis to Determine Phase Fractions in Solid-State Precipitation Reactions

2010 ◽  
Vol 41 (9) ◽  
pp. 2216-2223 ◽  
Author(s):  
John W. Gibbs ◽  
Michael J. Kaufman ◽  
Robert E. Hackenberg ◽  
Patricio F. Mendez
Keyword(s):  
Solid State ◽  
Curve Analysis ◽  
Cooling Curve ◽  
Cooling Curve Analysis ◽  
Precipitation Reactions
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