TY - CHAP

T1 - Simulation of stresses during casting of binary magnesium-aluminum alloys

AU - Pokorny, M. G.

AU - Monroe, C. A.

AU - Beckermann, C.

AU - Zhen, Z.

AU - Hort, N.

PY - 2010

Y1 - 2010

N2 - A visco-plastic deformation model is used to predict thermal stresses during casting of binary Mg-Al alloys. The predictions are compared to experiments that allow for the measurement of contraction forces during solidification and cooling. These force measurements, together with estimates from data found in the literature, are used to obtain the high-temperature mechanical properties needed in the stress model. The simulation results show generally good agreement with the measurements. The coherency and yielding behavior of the semi-solid material during solidification is investigated in some detail. It is found that coherency starts at a solid fraction of about 0.5 and that the maximum tensile stress at the final solidification temperature is 1.5 MPa and 4 MPa for Mg-1 and 9wt.%Al alloys, respectively.

AB - A visco-plastic deformation model is used to predict thermal stresses during casting of binary Mg-Al alloys. The predictions are compared to experiments that allow for the measurement of contraction forces during solidification and cooling. These force measurements, together with estimates from data found in the literature, are used to obtain the high-temperature mechanical properties needed in the stress model. The simulation results show generally good agreement with the measurements. The coherency and yielding behavior of the semi-solid material during solidification is investigated in some detail. It is found that coherency starts at a solid fraction of about 0.5 and that the maximum tensile stress at the final solidification temperature is 1.5 MPa and 4 MPa for Mg-1 and 9wt.%Al alloys, respectively.

KW - Casting

KW - Magnesium Alloys

KW - Stress simulation

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=77952384275&partnerID=8YFLogxK

M3 - Article in conference proceedings

AN - SCOPUS:77952384275

SN - 9780873397469

T3 - Magnesium Technology

SP - 401

EP - 407

BT - Magnesium Technology 2010 - Held During TMS 2010 Annual Meeting and Exhibition

A2 - Agnew, Sean R.

A2 - Neelameggham, Neale R.

A2 - Nyberg, Eric A.

A2 - Sillekens, Wim H.

PB - John Wiley & Sons Inc.

T2 - Magnesium Technology 2010 - TMS 2010 Annual Meeting and Exhibition

Y2 - 14 February 2010 through 18 February 2010

ER -