The interaction of precipitation and deformation in a binary Mg-Ca alloy at elevated temperatures
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The interaction of precipitation and deformation in a binary Mg-Ca alloy at elevated temperatures. / Lalpoor, M.; Miroux, A.; Mendis, C. L. et al.
In: Materials Science and Engineering A, Vol. 609, 15.07.2014, p. 116-124.Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - The interaction of precipitation and deformation in a binary Mg-Ca alloy at elevated temperatures
AU - Lalpoor, M.
AU - Miroux, A.
AU - Mendis, C. L.
AU - Hort, N.
AU - Offerman, S. E.
PY - 2014/7/15
Y1 - 2014/7/15
N2 - The effect of pre-deformation on precipitation hardening response as well as the work-hardening behavior of a binary Mg-Ca alloy are investigated. Our results show that application of 5% pre-deformation increases the precipitation hardening response of the material and decreases the annealing time by 50%. The dislocations introduced during the pre-deformation process act as predominant nucleation sites and result in a higher number of precipitates of smaller size. During the thermomechanical treatments, the work hardening behavior is altered by the state of the precipitates, namely, under-aged, peak-aged and over-aged. After the elastic-plastic transition, under-aged and peak-aged materials show a continuously decreasing work-hardening rate, while the over-aged material has an initial constant work-hardening rate. The absolute values of the work hardening rate are far less sensitive to the precipitation stage compared to aluminum alloys; a fact that explains the low work hardening capacity of magnesium compared to aluminum.
AB - The effect of pre-deformation on precipitation hardening response as well as the work-hardening behavior of a binary Mg-Ca alloy are investigated. Our results show that application of 5% pre-deformation increases the precipitation hardening response of the material and decreases the annealing time by 50%. The dislocations introduced during the pre-deformation process act as predominant nucleation sites and result in a higher number of precipitates of smaller size. During the thermomechanical treatments, the work hardening behavior is altered by the state of the precipitates, namely, under-aged, peak-aged and over-aged. After the elastic-plastic transition, under-aged and peak-aged materials show a continuously decreasing work-hardening rate, while the over-aged material has an initial constant work-hardening rate. The absolute values of the work hardening rate are far less sensitive to the precipitation stage compared to aluminum alloys; a fact that explains the low work hardening capacity of magnesium compared to aluminum.
KW - Materials scarcity
KW - Mg-Ca alloys
KW - Precipitation
KW - Thermomechanical treatment
KW - Work hardening
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84900819472&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2014.04.095
DO - 10.1016/j.msea.2014.04.095
M3 - Journal articles
AN - SCOPUS:84900819472
VL - 609
SP - 116
EP - 124
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
ER -