Influence of Reversion Annealing on the Mechanical Properties of High-manganese TRIP/TWIP Steels
The aim of the present investigation was to study the possibility of combining and adjusting the beneficial influences of both TWIP and TRIP effect on the mechanical properties of high manganese steels.To this purpose,two high-manganese TRIP/TWIP steels with different volume fractions of ε-martensite (5%~24%) after pre-deformation were investigated.In order to determine the influence of the initial microstructure,four specific conditions were studied,namely,pre-deformed,reversion-annealed,recovery-annealed and fully recrystallized.Reversion annealing resulted in the transformation of ε-martensite to austenite at low temperature and time (350°C/2min).During recovery annealing at 550°C for 5 min,annihilation of dislocations was initiated in addition to the ε-martensite transformation.Both heat treatments resulted in a bimodal microstructure comprising strong austenite with high fractions of deformation twins and dislocations that retained the high yield strength and soft reverted austenite that facilitated an improved work-hardening capacity.
TWIP TRIP reversion annealing microstructure thermomechanical treatment
BERRENBERG Frederike HAASE Christian BARRALES-MORA Luis A MOLODOV Dmitri A.
Institute of Physical Metallurgy and Metal Physics, RWTH Aachen University,Aachen 52074, Germany
国际会议
成都
英文
107-110
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）