16MnR钢在不同疲劳周次下塑性变形的“原位”背散射电子衍射检测
“In-situ” EBSD Inspection of Plastic Deformation of 16MnR Steel under Different Fatigue Cycles
摘 要
利用背散射电子衍射(EBSD)对退火压力容器用钢16MnR在不同疲劳周次下进行“原位” EBSD试验, 获得与之对应的晶体取向图。采用局域取向错配角(KAM)的大小及变化定性反映材料疲劳损伤过程中的塑性变形程度。结果发现: 疲劳次数与材料塑性变形程度并不是规则的线性关系, 疲劳过程存在疲劳硬化导致材料变形速率下降的现象。材料的塑性变形特点表明晶界及微观结构不均匀处是疲劳塑性变形敏感区。
背散射电子衍射
局域取向错配角
疲劳损伤
塑性变形
16MnR steel
EBSD
KAM
fatigue damage
plastic deformation
Abstract
The “in-situ” electron back scatter diffraction (EBSD) experiments were carried out on the annealed pressure vessel steel 16MnR at different fatigue cycles in order to obtain the corresponding crystal orientation maps. Kernel average misorientation (KAM) value and diversification qualitatively described plastic deformation in the process of fatigue damage. The results showed that it was not inerratic linear relationship between the fatigue cycles and plastic deformation of material, but there was fatigue hardening in the fatigue process that caused material deformation rate becoming slow. Plastic deformation features showed that the grain boundaries and uneven microstructure sections were plastic deformation sensitive areas.
中图分类号 TG142.1
所属栏目 试验与研究
基金项目 十一五国家科技支撑计划(2006BAK02B02)
收稿日期 2012/4/12
修改稿日期
网络出版日期
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备注张鸥(1986-), 男, 硕士。
引用该论文: ZHANG Ou,XU Xue-dong,ZHANG Hai,AN Dong. “In-situ” EBSD Inspection of Plastic Deformation of 16MnR Steel under Different Fatigue Cycles[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2013, 49(1): 1～5
张鸥,徐学东,张海,安栋. 16MnR钢在不同疲劳周次下塑性变形的“原位”背散射电子衍射检测[J]. 理化检验－物理分册, 2013, 49(1): 1～5
被引情况:
【1】吴艳, "电子背散射衍射技术在IF钢再结晶形核研究中的应用",理化检验－物理分册 50, 625-628(2014)
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参考文献
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【2】RANDLE V. Microtexture Determination and its Applications[M]. Londen:Maney for the Institute of Materials, Minerals and Mining, 2003:2-5.
【3】DINGLEY D J , WILKINSON A J, MEADEN G, et al. Elastic strain tensor measurement using electron backscatter diffraction in the SEM[J]. Journal of Electron Microscopy, 2010, 59:S155-S163.
【4】WILKINSON A J, CLARKE E E, BRITTON T B, et al. High-resolution electron backscatter diffraction: an emerging tool for studying local deformation[J]. Journal of Strain Analysis for Engineering Design, 2010, 45(5): 365-376.
【5】WILKINSON A J, MEADEN G, DINGLEY D J. Mapping strains at the nanoscale using electron back scatter diffraction[J]. Superlattices and Microstructures, 2009,45(4/5): 285-294.
【6】YODA R, YOKOMAKU T, TSUJI N. Plastic deformation and creep damage evaluations of type 316 austenitic stainless steels by EBSD[J]. Materials Characterization, 2010,61(10): 913-922.
【7】KAMAYA M. Characterization of microstructural damage due to low-cycle fatigue by EBSD observation[J]. Materials Characterization, 2009,60(12): 1454-1462.
【8】KIMURA H, AKINIWA Y, TANAKA K, et al. Fatigue crack initiation behavior in ultratine-grained steel observed by AFM and EBSP[J]. Jsme International Journal Series a-Solid Mechanics and Material Engineering, 2004,47(3): 331-340.
【9】MARINELLI M C, EL BARTALI A, SIGNORELLI J W, et al. Activated slip systems and microcrack path in LCF of a duplex stainless steel[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2009,509(1/2):81-88.
【10】MU P, AUBIN V. Microcrack initiation in low-cycle fatigue of an austenitic stainless steel[J]. Fatigue 2010,2010,2(1):1951-1960.
【11】焦汇胜,阮中慈,郑运荣.材料科学与技术丛书(第六卷)[M].北京: 科学出版社, 1998:124-130.
【12】BROWN L M. Dislocations and the fatigue strength of metals[J]. In Dislocation Modelling of Physical Systems, ASHBY M F, BULLOUGH R, HARTLEY C S, et al, ed. 1981(Pergamon):51-67.
【13】CANTRELL J H. Substructural organization, dislocation plasticity and harmonic generation in cyclically stressed wavy slip metals[J]. Proceedings of the Royal Society of London Series a-Mathematical Physical and Engineering Sciences, 2004,460(2043): 757-780.
【14】RANDLE V, DAVIES H, CROSS I. Grain boundary misorientation distributions[J]. Current Opinion in Solid State & Materials Science, 2001,5(1): 3-8.
【15】EWING J A, HUMFREY J C. The fracture of metals under rapid alterations of stress[J]. Philosophical Transactions of the Royal Society, 1903(A200):241-250.
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