Study of hot forging behavior of as-cast Mg-3Al-1Zn-2Ca alloy towards optimization of its hot workability
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in: Materials and Design, Jahrgang 57, 05.2014, S. 697-704.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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T1 - Study of hot forging behavior of as-cast Mg-3Al-1Zn-2Ca alloy towards optimization of its hot workability
AU - Suresh, K.
AU - Rao, K. P.
AU - Prasad, Y. V.R.K.
AU - Hort, N.
AU - Kainer, K. U.
PY - 2014/5
Y1 - 2014/5
N2 - Mg-3Al-1Zn-2Ca (AZX312) alloy has been forged in the temperature range of 350-500°C and at speeds in the range of 0.01-10mms-1 to produce a rib-web shape with a view to validate the processing map and study the microstructural development. The process was simulated through finite-element method to estimate the local and average strain rate ranges in the forging envelope. The processing map exhibited two domains in the following ranges: (1) 350-450°C/0.0003-0.05s-1 and (2) 450-500°C/0.03-0.7s-1 and these represent dynamic recrystallization (DRX) and intercrystalline cracking, respectively. The optimal workability condition according to the processing map is 425-450°C/0.001-0.01s-1. A wide flow instability regime occurred at higher strain rates diagonally across the map, which caused flow localization that should be avoided in forming this alloy. The experimental load-stroke curves correlated well with the simulated ones and the observed microstructural features in the forged components matched with the ones predicted by the processing map.
AB - Mg-3Al-1Zn-2Ca (AZX312) alloy has been forged in the temperature range of 350-500°C and at speeds in the range of 0.01-10mms-1 to produce a rib-web shape with a view to validate the processing map and study the microstructural development. The process was simulated through finite-element method to estimate the local and average strain rate ranges in the forging envelope. The processing map exhibited two domains in the following ranges: (1) 350-450°C/0.0003-0.05s-1 and (2) 450-500°C/0.03-0.7s-1 and these represent dynamic recrystallization (DRX) and intercrystalline cracking, respectively. The optimal workability condition according to the processing map is 425-450°C/0.001-0.01s-1. A wide flow instability regime occurred at higher strain rates diagonally across the map, which caused flow localization that should be avoided in forming this alloy. The experimental load-stroke curves correlated well with the simulated ones and the observed microstructural features in the forged components matched with the ones predicted by the processing map.
KW - Ca addition
KW - Hot forging
KW - Magnesium alloy
KW - Processing map
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84893638376&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2014.01.032
DO - 10.1016/j.matdes.2014.01.032
M3 - Journal articles
AN - SCOPUS:84893638376
VL - 57
SP - 697
EP - 704
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
ER -