TY - JOUR
T1 - Corrosion fatigue of extruded magnesium alloys
AU - Unigovski, Ya
AU - Eliezer, A.
AU - Abramov, E.
AU - Snir, Y.
AU - Gutman, E. M.
N1 - Funding Information:
The present work was sponsored by the Consortium of Magnesium Technologies Development (the Israeli Ministry of Industry and Trade). The authors are grateful to B. Edelstein, H. Uziel, G. Backner and G. Ben-Hamu (Ben-Gurion University of the Negev) for their participation in fatigue and mechanochemical tests, O. Nabutovski (Ben-Gurion University of the Negev) for his kind assistance in SEM, to Dr E. Aghion and his staff (R&D Department of the Dead Sea Magnesium Ltd) for great help in our experiments, to Z. Koren and H. Rosenson (Israel Institute of Metals, Technion, Haifa) and to A. Ben-Arzty (Rotem Industries Ltd) for supplying us with die-cast and extruded alloys.
PY - 2003/11/15
Y1 - 2003/11/15
N2 - Corrosion fatigue tests were carried out on extruded AZ31 (3% Al, 1% Zn, 0.3% Mn, Mg-the rest), AM50 (5% Al, 0.4% Mn, Mg-the rest) and ZK60 (5% Zn, 0.5% Zr, Mg-the rest) Mg alloys in air, NaCl-based and borate solutions. Nsol/Nair ratios (the relative fatigue life) were used for the analysis of the corrosion fatigue behavior of Mg alloys in various environments, where Nsol and Nair are the numbers of cycles to failure in the solution and in air, respectively. Extruded ZK60 alloy reveals very high fatigue and corrosion fatigue properties in comparison with other alloys. However, it has the lowest relative fatigue life (Nsol/Nair ∼ 10-3-10-2) or the highest sensitivity to the action of NaCl-based solutions in comparison with that of AM50 and AZ31 alloys (Nsol/Nair ∼ 10-2-10-1). Under the same stress, the corrosion fatigue life of extruded alloys is significantly longer than that of die-cast alloys (Nsol for extruded AM50 in NaCl is two to three times longer than that of die-cast AM50).
AB - Corrosion fatigue tests were carried out on extruded AZ31 (3% Al, 1% Zn, 0.3% Mn, Mg-the rest), AM50 (5% Al, 0.4% Mn, Mg-the rest) and ZK60 (5% Zn, 0.5% Zr, Mg-the rest) Mg alloys in air, NaCl-based and borate solutions. Nsol/Nair ratios (the relative fatigue life) were used for the analysis of the corrosion fatigue behavior of Mg alloys in various environments, where Nsol and Nair are the numbers of cycles to failure in the solution and in air, respectively. Extruded ZK60 alloy reveals very high fatigue and corrosion fatigue properties in comparison with other alloys. However, it has the lowest relative fatigue life (Nsol/Nair ∼ 10-3-10-2) or the highest sensitivity to the action of NaCl-based solutions in comparison with that of AM50 and AZ31 alloys (Nsol/Nair ∼ 10-2-10-1). Under the same stress, the corrosion fatigue life of extruded alloys is significantly longer than that of die-cast alloys (Nsol for extruded AM50 in NaCl is two to three times longer than that of die-cast AM50).
KW - Corrosion fatigue
KW - Fitting equations
KW - Magnesium alloys
KW - Relative fatigue life
UR - http://www.scopus.com/inward/record.url?scp=0141907229&partnerID=8YFLogxK
U2 - 10.1016/S0921-5093(03)00409-X
DO - 10.1016/S0921-5093(03)00409-X
M3 - Article
AN - SCOPUS:0141907229
SN - 0921-5093
VL - 360
SP - 132
EP - 139
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 1-2
ER -