TY - JOUR
T1 - Thermal stability of ultrafine-grained aluminum in the presence of Mg and Zr additions
AU - Hasegawa, Hideaki
AU - Komura, Shogo
AU - Utsunomiya, Atsushi
AU - Horita, Zenji
AU - Furukawa, Minoru
AU - Nemoto, Minoru
AU - Langdon, Terence G.
N1 - Funding Information:
We thank Takayoshi Fujinami, Hiroaki Kawahara and Yoshinori Iwahashi for experimental assistance. This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan, in part by the Japan Society for the Promotion of Science, and in part by the National Science Foundation of the United States under Grants No. DMR-9625969 and INT-9602919.
PY - 1999/6/15
Y1 - 1999/6/15
N2 - Superplastic deformation occurs at high temperatures and requires the presence of a very small grain size. Experiments demonstrate that equal-channel angular (ECA) pressing is capable of introducing ultrafine grain sizes in pure Al, Al-Mg and Al-Zr alloys, with grain sizes lying in the sub-micrometer range for the alloys. It is shown by static annealing that these ultrafine grain sizes are not stable in pure Al and the Al-Mg alloys at elevated temperatures but in the Al-Zr alloys the grains remain small up to temperatures of ≈600 K.
AB - Superplastic deformation occurs at high temperatures and requires the presence of a very small grain size. Experiments demonstrate that equal-channel angular (ECA) pressing is capable of introducing ultrafine grain sizes in pure Al, Al-Mg and Al-Zr alloys, with grain sizes lying in the sub-micrometer range for the alloys. It is shown by static annealing that these ultrafine grain sizes are not stable in pure Al and the Al-Mg alloys at elevated temperatures but in the Al-Zr alloys the grains remain small up to temperatures of ≈600 K.
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U2 - 10.1016/s0921-5093(98)01136-8
DO - 10.1016/s0921-5093(98)01136-8
M3 - Article
AN - SCOPUS:0000111421
VL - 265
SP - 188
EP - 196
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -