宋孟,刘相华,孙祥坤,刘立忠

• 1:东北大学轧制技术及连轧自动化国家重点实验室
• 2:东北大学研究院
• 3:东北大学材料与冶金学院

摘要(Abstract)：

对低碳钢极薄带进行热处理后发现,在成品厚度为25μm以下时,其厚度方向只有一层晶粒。这种单层晶的晶界面积在晶粒总表面积中的占比很小,导致其组织性能与常规材料不同。为了研究单层晶极薄带的尺寸效应,进行单轴拉伸实验。结果表明,对于厚度方向只有少数晶粒的极薄带而言,抗拉强度和伸长率均随厚度/晶粒尺寸(T/D)比值的减小而降低。分析主要原因是晶粒自由表面比例大,位错容易从晶界表面逃逸,导致产生上述尺寸效应。

关键词(KeyWords)： 低碳钢极薄带;单层晶极薄带;尺寸效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51374069);; 国家自然科学基金-宝钢钢铁联合项目(U1460107)

作者(Author): 宋孟,刘相华,孙祥坤,刘立忠

DOI: 10.13289/j.issn.1009-6264.2016.s1.002

参考文献(References)：

• [1]Craighead H G.Nanoelectromechanical systems[J].Science,2000,290:1532-1535.
• [2]Engler O,Huh M Y.Evolution of the cube texture in high purity aluminum capacitor foils by continuous recrystallization and subsequent grain growth[J].Materials Science and Engineering A,1999,271(1):371-381.
• [3]董湘怀,王倩,章海明,等.微成形中尺寸效应研究的进展[J].中国科学:技术科学,2013,43(2):115-130.DONG Xiang-huai,WANG Qian,ZHANG Hai-ming,et al.Advance of the researches on size effect of micro forming.[J]Scintia Sinica:Technologica,2013,43(2):115-130.
• [4]汤德林,刘相华,宋孟.工业纯铝在室温和深冷轧制条件下的微尺寸效应[J].材料热处理学报,2015,36(2):32-36.TANG De-lin,LIU Xiang-hua,SONG Meng.Micro size effcet of commercial pure aluminium rolled at room and cryogenic temperature[J].Transactions of Materials and Heat Treatment,2015,36(2):32-36.
• [5]邹广平,王丹丹,王瑞瑞,等.镍钛形状记忆合金尺寸效应的实验研究[J].材料热处理学报,2012,33(12):41-46.ZOU Guang-ping,WANG Dan-dan,WANG Rui-rui,et al.Experimental stuy on size effect of Ni-Ti shape memory alloy[J].Transactions of Materials and Heat Treatment,2012,33(12):41-46.
• [6]Xu Z T,Peng L F,Lai X M,et al.Geometry and grain size effects on the forming limit of sheet metals in micro-scaled plastic deformation[J].Materials Science&Engineering A,2014,611:345-353.
• [7]Sharon J A,Zhang Y,Mompiou F,et al.Discerning size effect strengthening in ultrane-grained Mg thin[J].Scripta Materialia,2014,75:10-13.
• [8]Wang C W C,Guo B,Shan D,et al.Size effect onow stress in uniaxial compression of pure nickel[J].Materials Letters,2013,106:294-296.
• [9]Wang C,Wang C,Xu J,et al.Plastic deformation size effects in micro-compression of pure nickel with a few grains across diameter[J].Materials Science and Engineering A,2015,636:352-360.
• [10]Zhan H Y,Gu Y T.Torsional properties of bamboo-like structured Cu nanowires[J].Grain Boundary,2013,1(18):1-9.
• [11]Walton D T,Frost H J,Thompson C V.Development of near-bamboo and bamboo microstructures[J].Appl Phys Lett,1991,61(1):40-42.
• [12]Raj R,Ashby M F.Grain Boundary Sliding,and the Effects of Particles on Its Rate[J].Metallurgical Transactions A,1971,3:1937-1942.
• [13]Lederer M,Groger V,Khatibi G,et al.Size dependency of mechanical properties of high purity aluminium foils[J].Materials Science&Engineering A,2010,527:590-599.
• [14]Petch N J.The cleavage strength of ploycrystals[J].J Iron Steel Inst,1953,174(25):
• [15]Hall E O.The deformation and ageing of mild steel III discussion of results[J].Proc Phys Soc B,1951,64(9):747.
• [16]Chan W L,Fu M W,Lu J.The size effect on micro deformation behaviour in micro-scale plastic deformation[J].Materials&Design,2011,32(1):198-206.
• [17]郭斌,周健,单德彬,等.黄铜箔拉伸屈服强度的尺寸效应[J].金属学报,2008,44(4):419-422.GUO Bin,ZHOU Jian,SHAN De-bin,et al.Size effcets of yield strength of brass foil in tensile test.[J]Acta Metallurgica Sinica,2008,44(4):419-422.
• [18]Ovid'ko I A,Sheinerman A G.Misfit dislocation loops in composite nanowires[J].Philosophical Magazine,2004,84(20):2103-2118.

文章评论(Comment)：