Compressive strength and hot deformation behavior of TX32 magnesium alloy with 0.4% Al and 0.4% Si additions
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Magnesium Technology 2011 - Held During TMS 2011 Annual Meeting and Exhibition. Hrsg. / Wim H. Sillekens; Sean R. Agnew; Neale R. Neelameggham; Suveen N. Mathaudhu. The Minerals, Metals & Materials Society, 2011. S. 169-174 (Magnesium Technology).
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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TY - CHAP
T1 - Compressive strength and hot deformation behavior of TX32 magnesium alloy with 0.4% Al and 0.4% Si additions
AU - Rao, K. P.
AU - Prasad, Y. V.R.K.
AU - Suresh, K.
AU - Dharmendra, C.
AU - Hort, N.
AU - Kainer, K. U.
N1 - Conference code: 140
PY - 2011
Y1 - 2011
N2 - Mg-3Sn-2Ca (TX32) alloy has good corrosion and creep resistance although its strength is inferior to AZ31 alloy. In this paper, the influence of additions of 0.4%A1 and 0.4%Si on the compressive strength and hot working characteristics of TX32 is reported. Although the room temperature compressive strength improved marginally with the alloying additions, the drop in higher-temperature strength is significant. By comparing with the alloy having only 0.4% Al, it is clear that the Si addition is responsible for this deterioration. The hot working behavior as characterized by processing maps revealed that TX32 exhibits two domains of dynamic recrystallization occurring in the temperature and strain rate ranges: (1) 300 - 350°C and 0.0003 - 0.001 s-1 and (2) 390-500°C and 0.005-0.6 s-1. In Al and Si containing TX32, both the domains moved to higher temperatures and the flow instability is reduced improving the hot workability. In both the domains, the apparent activation energy is higher than that for self-diffusion in magnesium implying that there is a significant contribution from the back stress generated by the hard particles present in the matrix.
AB - Mg-3Sn-2Ca (TX32) alloy has good corrosion and creep resistance although its strength is inferior to AZ31 alloy. In this paper, the influence of additions of 0.4%A1 and 0.4%Si on the compressive strength and hot working characteristics of TX32 is reported. Although the room temperature compressive strength improved marginally with the alloying additions, the drop in higher-temperature strength is significant. By comparing with the alloy having only 0.4% Al, it is clear that the Si addition is responsible for this deterioration. The hot working behavior as characterized by processing maps revealed that TX32 exhibits two domains of dynamic recrystallization occurring in the temperature and strain rate ranges: (1) 300 - 350°C and 0.0003 - 0.001 s-1 and (2) 390-500°C and 0.005-0.6 s-1. In Al and Si containing TX32, both the domains moved to higher temperatures and the flow instability is reduced improving the hot workability. In both the domains, the apparent activation energy is higher than that for self-diffusion in magnesium implying that there is a significant contribution from the back stress generated by the hard particles present in the matrix.
KW - Compressive strength
KW - Hot workability
KW - Kinetic analysis
KW - Mg-Sn-Ca-Al-Si alloy
KW - Processing maps
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84861387641&partnerID=8YFLogxK
U2 - 10.1002/9781118062029.ch33
DO - 10.1002/9781118062029.ch33
M3 - Article in conference proceedings
AN - SCOPUS:84861387641
SN - 9781118029367
T3 - Magnesium Technology
SP - 169
EP - 174
BT - Magnesium Technology 2011 - Held During TMS 2011 Annual Meeting and Exhibition
A2 - Sillekens, Wim H.
A2 - Agnew, Sean R.
A2 - Neelameggham, Neale R.
A2 - Mathaudhu, Suveen N.
PB - The Minerals, Metals & Materials Society
T2 - 140th Annual Meeting and Exhibition of Magnesium Technology 2011 - TMS 2011
Y2 - 27 February 2011 through 3 March 2011
ER -