Effect of Strain on Deformation Microstructure and Subsequent Annealing Behavior of IF Steel Heavily Deformed by ARB Process
Effect of Strain on Deformation Microstructure and Subsequent Annealing Behavior of IF Steel Heavily Deformed by ARB Process
复制标题
应变对ARB大变形IF钢变形组织及后续退火行为的影响
DOI：
10.4028/www.scientific.net/msf.467-470.341
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Y. Minamino
中科院分区：
文献类型：
--
作者：
N. Tsuji;N. Kamikawa;Y. Minamino
具有铁素体（b.c.c.）在500°C下，通过累积辊压焊（ARB）工艺将单相变形至0.8至5.6的各种等效应变。利用FE-SEM/EBSD分析了变形后试样的微观组织和晶体学特征。在塑性变形过程中的晶粒细分非常高的应变定量澄清。在4.0应变以上的大变形后，试样呈现出均匀的片层晶界结构，片层晶界平均间距约为200 nm，且80%以上为大角度晶界。退火行为的ARB处理IF钢强烈依赖于应变。变形到中等应变的试样表现出以形核和长大为特征的不连续再结晶，而变形到4.0以上的试样表现出连续再结晶。在定量测量变形态试样的显微组织和晶体学参数的基础上，讨论了再结晶行为。
Ultra low-carbon interstitial free (IF) steel having ferrite (b.c.c.) single phase was deformed to various equivalent strains ranging from 0.8 to 5.6 by the accumulative roll bonding (ARB) process at 500°C. The microstructure and crystallographic feature of the deformed specimens were characterized mainly by FE-SEM/EBSD analysis. Grain subdivision during the plastic deformation up to very high strain was clarified quantitatively. After heavy deformation above 4.0 of strain, the specimens showed the lamellar boundary structure uniformly, in which the mean spacing of the lamellar boundaries was about 200nm and more than 80% of the boundaries were high-angle ones. Annealing behavior of the ARB processed IF steel strongly depended on the strain. The specimens deformed to medium strains exhibited discontinuous recrystallization characterized by nucleation and growth, while the specimens deformed above strain of 4.0 showed continuous recrystallization. The recrystallization behaviors are discussed on the basis of the microstructural and crystallographic parameters quantitatively measured in the as-deformed samples.