TY - JOUR
T1 - INFLUENCE OF SOAKING TREATMENTS ON HOT DUCTILITY OF Al-4. 85 Pct Mg ALLOYS CONTAINING Mn.
AU - Lee, Sheng Long
AU - Wu, Shinn Tyan
PY - 1986
Y1 - 1986
N2 - Interrupted hot torsion at 450 degree C have been performed on as-cast specimens Al-4. 85 pct Mg-0. 74 pct Mn-0. 22 pct Cr homogenized by three different heating schedules. The tests lead to the finding that minor Si impurity, as little as 0. 05 pct, is harmful to hot ductility. Fe impurity up to 0. 34 pct has no influence. Preheating at 430 degree C for one and a half hours plus soaking at 530 degree C for eight hours results in the best hot ductility. Three different kinds of interdendritic precipitates (Fe, Mn)Al//x, (Cr,Mn,Fe,Ti)Al//7, and Mg//2Si have been identified by electron microscopy. After homogenization, submicron dispersoids of MnAl//6, containing Fe and Cr as alloying elements, precipitate within the dendrites and exert major influences on hot ductility.
AB - Interrupted hot torsion at 450 degree C have been performed on as-cast specimens Al-4. 85 pct Mg-0. 74 pct Mn-0. 22 pct Cr homogenized by three different heating schedules. The tests lead to the finding that minor Si impurity, as little as 0. 05 pct, is harmful to hot ductility. Fe impurity up to 0. 34 pct has no influence. Preheating at 430 degree C for one and a half hours plus soaking at 530 degree C for eight hours results in the best hot ductility. Three different kinds of interdendritic precipitates (Fe, Mn)Al//x, (Cr,Mn,Fe,Ti)Al//7, and Mg//2Si have been identified by electron microscopy. After homogenization, submicron dispersoids of MnAl//6, containing Fe and Cr as alloying elements, precipitate within the dendrites and exert major influences on hot ductility.
UR - http://www.scopus.com/inward/record.url?scp=0022712928&partnerID=8YFLogxK
U2 - 10.1007/BF02643859
DO - 10.1007/BF02643859
M3 - 期刊論文
AN - SCOPUS:0022712928
SN - 0360-2133
VL - 17
SP - 833
EP - 841
JO - Metallurgical transactions. A, Physical metallurgy and materials science
JF - Metallurgical transactions. A, Physical metallurgy and materials science
IS - 5
ER -