TY - JOUR
T1 - Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloy
AU - Furukawa, Minoru
AU - Berbon, Patrick B.
AU - Horita, Zenji
AU - Nemoto, Minoru
AU - Tsenev, Nikolai K.
AU - Valiev, Ruslan Z.
AU - Langdon, Terence G.
PY - 1998
Y1 - 1998
N2 - Experiments were conducted to determine the age-hardening characteristics and the mechanical properties of an Al-5.5 pet Mg-2.2 pet Li-0.12 pet Zr alloy processed by equal-channel angular (EGA) pressing to give a very fine grain size of ∼1.2 μm. The results show that peak aging occurs more rapidly when the grain size is very fine, and this effect is interpreted in terms of the higher volume of precipitate-free zones in the fine-grained material. Mechanical testing demonstrates that the EGApressed material exhibits high strength and good ductility at room temperature compared to conventional Al alloys containing Li. Elongations of up to ∼550 pet may be achieved at an elevated temperature of 603 K in the EGA-pressed condition, thereby confirming that, in this condition, the alloy may be a suitable candidate material for use in superplastic forming operations.
AB - Experiments were conducted to determine the age-hardening characteristics and the mechanical properties of an Al-5.5 pet Mg-2.2 pet Li-0.12 pet Zr alloy processed by equal-channel angular (EGA) pressing to give a very fine grain size of ∼1.2 μm. The results show that peak aging occurs more rapidly when the grain size is very fine, and this effect is interpreted in terms of the higher volume of precipitate-free zones in the fine-grained material. Mechanical testing demonstrates that the EGApressed material exhibits high strength and good ductility at room temperature compared to conventional Al alloys containing Li. Elongations of up to ∼550 pet may be achieved at an elevated temperature of 603 K in the EGA-pressed condition, thereby confirming that, in this condition, the alloy may be a suitable candidate material for use in superplastic forming operations.
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U2 - 10.1007/s11661-998-0170-6
DO - 10.1007/s11661-998-0170-6
M3 - Article
AN - SCOPUS:0031700073
SN - 1073-5623
VL - 29
SP - 169
EP - 177
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 1
ER -