TY - JOUR
T1 - Factors influencing the flow and hardness of materials with ultrafine grain sizes
AU - Furukawa, Minoru
AU - Horita, Zenji
AU - Nemoto, Minoru
AU - Valiev, Ruslan Z.
AU - Langdon, Terence G.
N1 - Funding Information:
ACKWLEDGEMENNTSO We are gratfuel to Dr Nikolai K. Tsenev for expeimrentl aassitsncae in fabriact-ing tehmatriaels by ECA pressign. This work was supportdeby the Light Metlsa EducatonialFoundatoniofJapan,byaGrantn--idiAforScient® ciResearchfrom tehMinitrsy of Educatoni, Scencie, Sports anCdulurte of Japan, and byteh Natonial Science FoundatonioftehUnitdeStteausndeGrantrNso.DMR-9625969 and INT-6092919.
PY - 1998/7/1
Y1 - 1998/7/1
N2 - Ultrafine grain sizes were introduced into an Al-3wt%Mg solid solution alloy and a commercial Al-Mg-Li-Zr alloy through intense plastic straining by equal-channel angular (ECA) pressing at room temperature and at 673 K respectively. Tensile testing of pressed samples at room temperature revealed markedly different stress-strain curves for these two alloys, with the Al-3wt%Mg alloy exhibiting a high yield stress with little subsequent strain hardening and the Al-Mg-Li-Zr alloy exhibiting a lower yield stress and extensive strain hardening after yielding. These and other experimental results are interpreted in terms of the nature of the microstructure introduced by the ECA pressing procedure. It is concluded that significant variations may occur in the mechanical properties of nominally similar ultrafine-grained materials depending upon the pressing conditions and the extent of any relaxation which may occur during the straining process.
AB - Ultrafine grain sizes were introduced into an Al-3wt%Mg solid solution alloy and a commercial Al-Mg-Li-Zr alloy through intense plastic straining by equal-channel angular (ECA) pressing at room temperature and at 673 K respectively. Tensile testing of pressed samples at room temperature revealed markedly different stress-strain curves for these two alloys, with the Al-3wt%Mg alloy exhibiting a high yield stress with little subsequent strain hardening and the Al-Mg-Li-Zr alloy exhibiting a lower yield stress and extensive strain hardening after yielding. These and other experimental results are interpreted in terms of the nature of the microstructure introduced by the ECA pressing procedure. It is concluded that significant variations may occur in the mechanical properties of nominally similar ultrafine-grained materials depending upon the pressing conditions and the extent of any relaxation which may occur during the straining process.
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U2 - 10.1080/01418619808244809
DO - 10.1080/01418619808244809
M3 - Article
AN - SCOPUS:85047697546
VL - 78
SP - 203
EP - 215
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
SN - 0141-8610
IS - 1
ER -