HOT CRACKING SUSCEPTIBILITY OF BINARY MG-AL ALLOYS

Guoping Cao; Sindo Kou; Y. Austin Chang

doi:10.1007/978-3-319-48099-2_34

HOT CRACKING SUSCEPTIBILITY OF BINARY MG-AL ALLOYS

Guoping Cao
, Sindo Kou
, Y. Austin Chang

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

The susceptibility of binary Mg-Al alloys in permanent mold casting was tested, including Mg-0.25Al, Mg-0.6Al, Mg-1Al, Mg-2Al, Mg-4Al and Mg-8Al (all in wt %). A steel mold was used for constrained rod casting (CRC), in which rods of various lengths were cast with sudden enlargement at both ends of each rod to prevent it from free contraction during solidification and thus induce hot cracking. The cooling rate near the location of cracking was measured. The hot cracking susceptibility was evaluated based on the widths and locations of the cracks observed. The curve of crack susceptibility vs. Al content was determined and compared with previous curves based on ring casting in steel molds and constrained rod casting in sand molds. The Scheil model of solidification was used to calculate the curves of temperature vs. fraction solid (T-f_S) of the alloys. The crack susceptibility curve based on a simplified hot cracking criterion and the T-f_S and cooling curves was compared with that based on CRC.

Original language	English
Title of host publication	Essential Readings in Magnesium Technology
Publisher	Springer International Publishing
Pages	205-209
Number of pages	5
ISBN (Electronic)	9783319480992
ISBN (Print)	9781118858943
DOIs	https://doi.org/10.1007/978-3-319-48099-2_34
State	Published - Jan 1 2016
Externally published	Yes

Keywords

Mg-Al alloys
casting
hot cracking

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10.1007/978-3-319-48099-2_34

Cite this

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title = "HOT CRACKING SUSCEPTIBILITY OF BINARY MG-AL ALLOYS",

abstract = "The susceptibility of binary Mg-Al alloys in permanent mold casting was tested, including Mg-0.25Al, Mg-0.6Al, Mg-1Al, Mg-2Al, Mg-4Al and Mg-8Al (all in wt \%). A steel mold was used for constrained rod casting (CRC), in which rods of various lengths were cast with sudden enlargement at both ends of each rod to prevent it from free contraction during solidification and thus induce hot cracking. The cooling rate near the location of cracking was measured. The hot cracking susceptibility was evaluated based on the widths and locations of the cracks observed. The curve of crack susceptibility vs. Al content was determined and compared with previous curves based on ring casting in steel molds and constrained rod casting in sand molds. The Scheil model of solidification was used to calculate the curves of temperature vs. fraction solid (T-fS) of the alloys. The crack susceptibility curve based on a simplified hot cracking criterion and the T-fS and cooling curves was compared with that based on CRC.",

keywords = "Mg-Al alloys, casting, hot cracking",

author = "Guoping Cao and Sindo Kou and Chang, \{Y. Austin\}",

note = "Publisher Copyright: {\textcopyright} 2016 by The Minerals, Metals \& Materials Society.",

year = "2016",

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doi = "10.1007/978-3-319-48099-2\_34",

language = "English",

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AU - Cao, Guoping

AU - Kou, Sindo

AU - Chang, Y. Austin

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The susceptibility of binary Mg-Al alloys in permanent mold casting was tested, including Mg-0.25Al, Mg-0.6Al, Mg-1Al, Mg-2Al, Mg-4Al and Mg-8Al (all in wt %). A steel mold was used for constrained rod casting (CRC), in which rods of various lengths were cast with sudden enlargement at both ends of each rod to prevent it from free contraction during solidification and thus induce hot cracking. The cooling rate near the location of cracking was measured. The hot cracking susceptibility was evaluated based on the widths and locations of the cracks observed. The curve of crack susceptibility vs. Al content was determined and compared with previous curves based on ring casting in steel molds and constrained rod casting in sand molds. The Scheil model of solidification was used to calculate the curves of temperature vs. fraction solid (T-fS) of the alloys. The crack susceptibility curve based on a simplified hot cracking criterion and the T-fS and cooling curves was compared with that based on CRC.

AB - The susceptibility of binary Mg-Al alloys in permanent mold casting was tested, including Mg-0.25Al, Mg-0.6Al, Mg-1Al, Mg-2Al, Mg-4Al and Mg-8Al (all in wt %). A steel mold was used for constrained rod casting (CRC), in which rods of various lengths were cast with sudden enlargement at both ends of each rod to prevent it from free contraction during solidification and thus induce hot cracking. The cooling rate near the location of cracking was measured. The hot cracking susceptibility was evaluated based on the widths and locations of the cracks observed. The curve of crack susceptibility vs. Al content was determined and compared with previous curves based on ring casting in steel molds and constrained rod casting in sand molds. The Scheil model of solidification was used to calculate the curves of temperature vs. fraction solid (T-fS) of the alloys. The crack susceptibility curve based on a simplified hot cracking criterion and the T-fS and cooling curves was compared with that based on CRC.

KW - Mg-Al alloys

KW - casting

KW - hot cracking

UR - https://www.scopus.com/pages/publications/85175395065

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SP - 205

EP - 209

BT - Essential Readings in Magnesium Technology

PB - Springer International Publishing

ER -

HOT CRACKING SUSCEPTIBILITY OF BINARY MG-AL ALLOYS

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Keywords

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