TY - JOUR
T1 - Hot-deformation behaviour and hot-processing map of melt-hydrogenated Ti–6Al–4V/(TiB+TiC)
AU - Lin, Xuejian
AU - Dong, Fuyu
AU - Zhang, Yue
AU - Yuan, Xiaoguang
AU - Huang, Hongjun
AU - Zheng, Bowen
AU - Wang, Liang
AU - Wang, Xuan
AU - Luo, Liangshun
AU - Su, Yanqing
AU - Xu, Yanjin
AU - Han, Baoshuai
N1 - Publisher Copyright:
© 2019 Hydrogen Energy Publications LLC
PY - 2019/3/29
Y1 - 2019/3/29
N2 - The hydrogen was straight-forward added to the Ti–6Al–4V/(TiC + TiB) composites (TiC[dbnd]TiB=5 vol.%) by melt hydrogenation. The results of hot compression show that the peak resistance of titanium matrix composites (TMCs) decreased by 17.2% when hydrogen content was 0.035 wt% compared with the TMCs without hydrogen. Therefore, the TMCs with a hydrogen content of 0.035 wt% was performed to a thermal compression experiment. Thermal-deformation characteristics and hot processing map of TMCs with a hydrogen content of 0.035 wt% were analyzed in the light of the flow stress curve, constitutive relations, and the dynamic-material model. The computed apparent activation energy was 284.54 kJ/mol, and the corresponding strain-rate sensitivity, power dissipation, and instability parameter were calculated. The hot-processing map exhibited maximum efficiencies of power dissipation at 780–840 °C/0.005–0.06 s −1 and there was only one instable region. The microstructures corresponding to the stable and instable region were verified, confirming the optimum processing parameters of hot-working that can be used as a reference for hot deformation of hydrogenated composites.
AB - The hydrogen was straight-forward added to the Ti–6Al–4V/(TiC + TiB) composites (TiC[dbnd]TiB=5 vol.%) by melt hydrogenation. The results of hot compression show that the peak resistance of titanium matrix composites (TMCs) decreased by 17.2% when hydrogen content was 0.035 wt% compared with the TMCs without hydrogen. Therefore, the TMCs with a hydrogen content of 0.035 wt% was performed to a thermal compression experiment. Thermal-deformation characteristics and hot processing map of TMCs with a hydrogen content of 0.035 wt% were analyzed in the light of the flow stress curve, constitutive relations, and the dynamic-material model. The computed apparent activation energy was 284.54 kJ/mol, and the corresponding strain-rate sensitivity, power dissipation, and instability parameter were calculated. The hot-processing map exhibited maximum efficiencies of power dissipation at 780–840 °C/0.005–0.06 s −1 and there was only one instable region. The microstructures corresponding to the stable and instable region were verified, confirming the optimum processing parameters of hot-working that can be used as a reference for hot deformation of hydrogenated composites.
KW - Constitutive equation
KW - Hot compressions simulation
KW - Melt hydrogenation
KW - Processing map
KW - Ti–6Al–4V/(TiC+TiB) composites
UR - http://www.scopus.com/inward/record.url?scp=85062032277&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2019.01.279
DO - 10.1016/j.ijhydene.2019.01.279
M3 - Article
AN - SCOPUS:85062032277
SN - 0360-3199
VL - 44
SP - 8641
EP - 8649
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 16
ER -
