The strain induced effect on the precipitation kinetics of a high strength low alloy (HSLA) steel microalloyed with Nb-V was investigated.The stress relaxation method was employed to determine the dependence of the pr...The strain induced effect on the precipitation kinetics of a high strength low alloy (HSLA) steel microalloyed with Nb-V was investigated.The stress relaxation method was employed to determine the dependence of the precipitation-time-temperature curves (PTT) on previous strain.Relaxation tests were performed over a temperature range of 850 to 1150 oC at a constant strain rate of 0.1 s-1 at three deformation levels,namely 5,15 and 25 pct.Field emission scanning electron microscopy (FESEM) was used to study the progress of precipitation on samples obtained by interrupted relaxation test at different times.Results display the acceleration kinetics at increasing strain.Theoretical models are discussed and compared with the present experimental results.展开更多
基金the support of the Foment Ministry through 80032/A04 Projectthe Ministry of the Innovation Technology and Science of Spain through Project MAT 2008-06793-C02-01
文摘The strain induced effect on the precipitation kinetics of a high strength low alloy (HSLA) steel microalloyed with Nb-V was investigated.The stress relaxation method was employed to determine the dependence of the precipitation-time-temperature curves (PTT) on previous strain.Relaxation tests were performed over a temperature range of 850 to 1150 oC at a constant strain rate of 0.1 s-1 at three deformation levels,namely 5,15 and 25 pct.Field emission scanning electron microscopy (FESEM) was used to study the progress of precipitation on samples obtained by interrupted relaxation test at different times.Results display the acceleration kinetics at increasing strain.Theoretical models are discussed and compared with the present experimental results.
