Understanding effects of microstructural inhomogeneity on creep response - New approaches to improve the creep resistance in magnesium alloys
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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in: Journal of Magnesium and Alloys, Jahrgang 2, Nr. 2, 01.06.2014, S. 124-132.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Understanding effects of microstructural inhomogeneity on creep response - New approaches to improve the creep resistance in magnesium alloys
AU - Huang, Yuanding
AU - Dieringa, Hajo
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
PY - 2014/6/1
Y1 - 2014/6/1
N2 - Previous investigations indicate that the creep resistance of magnesium alloys is proportional to the stability of precipitated intermetallic phases at grain boundaries. These stable intermetallic phases were considered to be effective to suppress the deformation by grain boundary sliding, leading to the improvement of creep properties. Based on this point, adding the alloying elements to form the stable intermetallics with high melting point became a popular way to develop the new creep resistant magnesium alloys. The present investigation, however, shows that the creep properties of binary Mg-Sn alloy are still poor even though the addition of Sn possibly results in the precipitation of thermal stable Mg2Sn at grain boundaries. That means other possible mechanisms function to affect the creep response. It is finally found that the poor creep resistance is attributed to the segregation of Sn at dendritic and grain boundaries. Based on this observation, new approaches to improve the creep resistance are suggested for magnesium alloys because most currently magnesium alloys have the commonality with the Mg-Sn alloys.
AB - Previous investigations indicate that the creep resistance of magnesium alloys is proportional to the stability of precipitated intermetallic phases at grain boundaries. These stable intermetallic phases were considered to be effective to suppress the deformation by grain boundary sliding, leading to the improvement of creep properties. Based on this point, adding the alloying elements to form the stable intermetallics with high melting point became a popular way to develop the new creep resistant magnesium alloys. The present investigation, however, shows that the creep properties of binary Mg-Sn alloy are still poor even though the addition of Sn possibly results in the precipitation of thermal stable Mg2Sn at grain boundaries. That means other possible mechanisms function to affect the creep response. It is finally found that the poor creep resistance is attributed to the segregation of Sn at dendritic and grain boundaries. Based on this observation, new approaches to improve the creep resistance are suggested for magnesium alloys because most currently magnesium alloys have the commonality with the Mg-Sn alloys.
KW - Creep resistance
KW - High temperature deformation
KW - Magnesium alloy
KW - Mechanical properties
KW - Microstructure
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84969262635&partnerID=8YFLogxK
U2 - 10.1016/j.jma.2014.03.003
DO - 10.1016/j.jma.2014.03.003
M3 - Journal articles
AN - SCOPUS:84969262635
VL - 2
SP - 124
EP - 132
JO - Journal of Magnesium and Alloys
JF - Journal of Magnesium and Alloys
SN - 2213-9567
IS - 2
ER -