Recrystallization in cold-rolled Fe–V–C alloy containing fine carbides
Recrystallization in cold-rolled Fe–V–C alloy containing fine carbides
复制标题
含有细碳化物的冷轧 Fe-V-C 合金的再结晶
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
D. Dunne
中科院分区：
文献类型：
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作者：
D. Dunne
冷轧含有~ 1 vol.-%细相V4C3颗粒的Fe-1V-0·23C合金，在轧制压降率大于20%时形成剪切带。虽然在一般情况下，由于颗粒的存在，位错分布是均匀的，但剪切带在随后的退火中为再结晶成核提供了有力的场所。在60%的冷轧样品中，706℃退火在15 min内开始再结晶，但在1000 h后再结晶过程仍不完全。这与相对较小体积分数的再结晶晶粒的剪切带和晶界位置耗尽以及析出相弥散对形核和生长速度的严重阻滞相一致。再结晶速率低与V4C3析出相在再结晶晶粒和亚晶粒边界上的钉钉作用有关。钉钉颗粒的粗化控制了再结晶界面的迁移速率。恢复与再结晶同时发生并相互竞争，并逐渐降低再结晶的驱动力。
Cold rolling an Fe–1V–0·23C alloy contaInIng ∼1 vol.-% of fine interphase V4C3 particles results in the formation of shear bands at rolling reductions greater than 20%. Although in general the dislocation distribution is homogenized by the presence of the particles, the shear bands provide potent sites for nucleation of recrystallization on subsequent annealing. In 60% cold-rolled samples, annealing at 706°C resulted in the onset of recrystallization within 15 min, but the recrystallization process was still incomplete after 1000 h. This is consistent with the exhaustion of shear-band and grain-boundary sites at a relatively small volume fraction of recrystallized grains, and the severe retardation of both nucleation and growth rates by the precipitate dispersion. The low rate of recrystallization is associated with the pinning effect of the V4C3 precipitates on boundaries of both recrystallized grains and subgrains. Coarsening of the pinning particles controls the rate of migration of the recrystallizing interfaces. Recovery is shown to occur simultaneously and competitively with recrystallization, and to reduce progressively the driving force for recrystallization.