无间隙原子钢晶界特性的电子背散射衍射研究
STUDY OF GRAIN BOUNDARY CHARACTER OF INTERSTITIAL-FREE STEELS BY EBSD
摘 要
运用电子背散射衍射(EBSD)技术，对不同冷轧变形条件下再结晶IF钢板中的晶界特征分布和晶界连通性进行了研究。结果表明，增加冷轧变形量，有利于增加IF钢板中的小角度晶界(∑1)，但对(∑3~∑29)重位点阵晶界的影响不大。低能特殊晶界(∑1~∑29)的增加有利于破碎IF钢板中的随机晶界网络，改善其晶界连通性。此外，IF钢板的晶界特征分布与其晶粒尺寸密切相关,小晶粒周围易出现低能特殊晶界，而大晶粒周围易出现高能随机晶界。
晶界特性
电子背散射衍射
Interstitial-free steel
Grain boundary character
Electron back-scatter diffraction
Abstract
Grain boundary character distribution (GBCD) and connectivity in the recrystallized IF steel sheets which cold-rolled by different reductions were investigated by electron back-scatter diffraction (EBSD).The results show that higher cold reduction is favorable for increasing the frequency of low-angle boundaries (∑1). While higher frequency of low-energy special boundaries (∑1~∑29) are favorable for the optimization of grain boundary connectivity. It has also been found that GBCD and connectivity of IF steels are closely related to the grain size. The small grains are mainly surrounded by special boundaries while the large grains are preferentially surrounded by random boundaries.
中图分类号 TG113.12
所属栏目
基金项目 国家自然科学资金资助项目(50171040)
收稿日期 2006/3/16
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备注李有元(1972-)，男，工程师。
引用该论文: LI You-yuan,CAO Sheng-quan,CHEN Jia-guang. STUDY OF GRAIN BOUNDARY CHARACTER OF INTERSTITIAL-FREE STEELS BY EBSD[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2006, 42(10): 487～491
李有元,曹圣泉,陈家光. 无间隙原子钢晶界特性的电子背散射衍射研究[J]. 理化检验－物理分册, 2006, 42(10): 487～491
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参考文献
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【3】Matsumoto K, Shibayanagi T, Umakoshi Y. Effect of Grain Size on Grain Orientations and Grain Boundary Character Distribution in Recrystallized Al-0.3mass% Mg Alloy[J]. Scripta Metall, 1995,33(8):1321-1326.
【4】Shimada M, Kokawa H, Wang Z J, et al. Optimization of Grain Boundary Character Distribution for Intergranular Corrosion Resistant 304 stainless Steel by Twin-induced Grain Boundary Engineering[J]. Acta Mater, 2002,50(2):2331-2341.
【5】Lehockey E M, Palumbo G, Lin P. Grain Boundary Structure Effects on Cold Work Embrittlement of Microalloyed Steels[J]. Scripta Mater, 1998,39(3):353-358.
【6】Cao S Q, Zhang J X, Wu J S, et al. Grain Boundary Character Distribution Effects on Secondary Working Embrittlement of Interstitial-free Steels[J]. Scripta Materialia, 2005,52(1):25-28.
【7】Zhou B, Gao M, Chou Y T. Effect of Boron on Grain Boundary Character Distribution in Ni3Al[J]. Scripta Mater, 1997,37(3):341-346.
【8】曹圣泉,张津徐,吴建生,等.IF钢显微织构与晶界特征分布的研究[J].金属学报, 2004,40(10):1045-1050.
【9】陈家光,李 忠.电子背散射衍射在材料科学研究中的应用[J].理化检验-物理分册, 2000,36(2):71-75.
【10】Kumar M, King W E, Schwartz A J. Modifications to the Microstructural Topology in f.c.c. Materials Through Thermomechanical Processing[J]. Acta Mater, 2000,(48):2081-2091.
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