TY - JOUR
T1 - Effect of temperature on the mechanical properties of mechanically-alloyed materials at high strain rates
AU - Higashi, K.
AU - Nieh, T. G.
AU - Wadsworth, J.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 1995/9
Y1 - 1995/9
N2 - The superplastic properties of several mechanically-alloyed materials. including IN9021, IN9052, IN905XL and 15 vol.% SiCp/IN9021, have been characterized. The tensile elongation to failure, strain rate sensitivity and activation energy are found to be dependent upon the testing temperature. Specifically, marked changes in these properties are closely related to incipient melting points in the materials. These observations confirm the suggestion that the presence of a small amount of liquid phase at interfaces and grain boundaries not only enhances the strain rate for superplasticity, but also has a strong influence on the deformation mechanisms. When the amount of liquid phase increases, as a result of increasing temperature, the expected observation is noted, i.e. the presence of the liquid phase degrades the material properties. A model is proposed to explain the experimental observations. © 1995 Acta Metallurgica Inc.
AB - The superplastic properties of several mechanically-alloyed materials. including IN9021, IN9052, IN905XL and 15 vol.% SiCp/IN9021, have been characterized. The tensile elongation to failure, strain rate sensitivity and activation energy are found to be dependent upon the testing temperature. Specifically, marked changes in these properties are closely related to incipient melting points in the materials. These observations confirm the suggestion that the presence of a small amount of liquid phase at interfaces and grain boundaries not only enhances the strain rate for superplasticity, but also has a strong influence on the deformation mechanisms. When the amount of liquid phase increases, as a result of increasing temperature, the expected observation is noted, i.e. the presence of the liquid phase degrades the material properties. A model is proposed to explain the experimental observations. © 1995 Acta Metallurgica Inc.
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U2 - 10.1016/0956-7151(95)00047-Y
DO - 10.1016/0956-7151(95)00047-Y
M3 - RGC 21 - Publication in refereed journal
SN - 0956-7151
VL - 43
SP - 3275
EP - 3282
JO - Acta Metallurgica et Materialia
JF - Acta Metallurgica et Materialia
IS - 9
ER -