TY - JOUR
T1 - High-pressure torsion of pure metals
T2 - Influence of atomic bond parameters and stacking fault energy on grain size and correlation with hardness
AU - Edalati, Kaveh
AU - Horita, Zenji
N1 - Funding Information:
One of the authors (K.E.) thanks the Islamic Development Bank (IDB) for a doctoral scholarship and the Japan Society for Promotion of Science (JSPS) for a postdoctoral scholarship. 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 MEXT, Japan, in Innovative Areas “Bulk Nanostructured Metals” and in part by Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (P&P).
PY - 2011/10
Y1 - 2011/10
N2 - The grain size in pure elements (magnesium, aluminum, silicon, titanium, vanadium, chromium, iron, nickel, copper, zinc, germanium, zirconium, niobium, molybdenum, palladium, silver, indium, tin, hafnium, tantalum, gold and lead) after processing by high-pressure torsion (HPT) reaches steady-state levels where the grain size remains unchanged with straining. The steady-state grain sizes decrease by atomic bond energy and related parameters such as specific heat capacity, activation energy for self-diffusion and homologous temperature and are reasonably independent of stacking fault energy. A good correlation exists between the hardness normalized by the shear modulus and grain size normalized by the Burgers vector, indicating that the important factor for strengthening HPT-processed pure metals is the average size of grains having high angles of misorientation.
AB - The grain size in pure elements (magnesium, aluminum, silicon, titanium, vanadium, chromium, iron, nickel, copper, zinc, germanium, zirconium, niobium, molybdenum, palladium, silver, indium, tin, hafnium, tantalum, gold and lead) after processing by high-pressure torsion (HPT) reaches steady-state levels where the grain size remains unchanged with straining. The steady-state grain sizes decrease by atomic bond energy and related parameters such as specific heat capacity, activation energy for self-diffusion and homologous temperature and are reasonably independent of stacking fault energy. A good correlation exists between the hardness normalized by the shear modulus and grain size normalized by the Burgers vector, indicating that the important factor for strengthening HPT-processed pure metals is the average size of grains having high angles of misorientation.
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U2 - 10.1016/j.actamat.2011.07.046
DO - 10.1016/j.actamat.2011.07.046
M3 - Article
AN - SCOPUS:80052263712
SN - 1359-6454
VL - 59
SP - 6831
EP - 6836
JO - Acta Materialia
JF - Acta Materialia
IS - 17
ER -