对经过大变形(轧制加表面机械研磨处理(Surface Mechanical Attrition Treatment,简称SMAT)处理)后的商业纯钛(C.P.Ti)的微观结构和力学性能进行了研究.结果表明:经过轧制和SMAT处理后的Ti微观结构分了3层且成梯度变化,最外层是一薄层非晶,次表面是纳米晶,芯部是超细晶粒.力学性能也存在梯度变化,硬度从表面到芯部逐渐减小,残余应力在表面为压应力,往芯部逐渐变成拉应力.多层结构钛(Multilayered hierarchical structure Ti,简称MHS-Ti)和超细晶粒钛(Ultrafine grained Ti,简称UFG-Ti的屈服强度明显大于C.P.Ti.MHS-Ti和UFG-Ti的屈服强度相近,随着应变的增大,MHS-Ti的强度增加得多,显示了优异的加工硬化性能.
参考文献
| [1] | Ma E .Nanocrystalline materials:Controlling plastic instability[J].NATURE MATERIALS,2003,2(01):7-8. |
| [2] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [3] | 周正存,杜洁,杨洪,严勇健,顾苏怡.化学成分对Ni-Al基合金相变内耗的影响[J].材料热处理学报,2013(12):59-62. |
| [4] | Guo He;Jurgen Eckert;Wolfgang Loser;Ludwig Schultz .Novel Ti-base nanostructure-dendrite composite with enhanced plasticity[J].Nature materials,2003(1):33-37. |
| [5] | Wang Y;Chen M;Zhou F;Ma E .High tensile ductility in a nanostructured metal.[J].Nature,2002(6910):912-915. |
| [6] | D.K. Yang;P.D. Hodgson;C.E. Wen .Simultaneously enhanced strength and ductility of titanium via multimodal grain structure[J].Scripta materialia,2010(9):941-944. |
| [7] | Osman Ertorer;Troy Topping;Ying Li .Enhanced tensile strength and high ductility in cryomilled commercially pure titanium[J].Scripta materialia,2009(7):586-589. |
| [8] | 顾苏怡,方红梅,周正存,杜洁.累积轧制Ti／AI复合材料的微观结构演变和力学性能研究[J].物理学报,2012(18):349-354. |
| [9] | Zhao YH;Bingert JF;Zhu YT;Liao XZ;Valiev RZ;Horita Z;Langdon TG;Zhou YZ;Lavernia EJ .Tougher ultrafine grain Cu via high-angle grain boundaries and low dislocation density[J].Applied physics letters,2008(8):81903-1-81903-3-0. |
| [10] | Y.ZHANG;W.H.WANG;A.L.GREER .Making metallic glasses plastic by control of residual stress[J].Nature materials,2006(11):857-860. |
| [11] | Green D J;Tandon R;Sglavo V M .Designed residual stress profiles crack arrest and multiple cracking in glass through the use of designed residual stress profiles[J].SCIENCE,1999,283(5406):1295-1297. |
| [12] | K. Lu;J. Lu .Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):38-45. |
| [13] | M. Umemoto;A. Huang;I. Tsuchiya .Formation of nanocrystalline structure in steels by ball drop test[J].Scripta materialia,2002(5):383-388. |
| [14] | Stolyarov V V;Zhu Y T;Lowe T C et al.Microstructure and properties of pure Ti processed by ECAP and cold extrusion[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2001,303(1-2):82-89. |
| [15] | Noyan I C;Cohen J B.Residual Stresses Measurement by Diffraction and Interpretation[M].New York:Springer-Verlag,1987 |
| [16] | N.E. Vives Diaz;R.E. Schacherl;L.F. Zagonel .Influence of the microstructure on the residual stresses of nitrided iron-chromium alloys[J].Acta materialia,2008(6):1196-1208. |
| [17] | Y. M. Wang;E. Ma;M. W. Chen .Enhanced tensile ductility and toughness in nanostructured Cu[J].Applied physics letters,2002(13):2395-2397. |
| [18] | S. H. Lee;Y. Saito;N. Tsuji .Role of shear strain in ultragrain refinement by accumulative roll-bonding (ARB) process[J].Scripta materialia,2002(4):281-285. |
| [19] | Dieter G E.Mechanical Metallurgy[M].McGraw-Hill,London,1988 |
| [20] | Lu J;Lu K.Surface Nanocrystallization (SNC) of Materials and its Effect on Mechanical Behavior[A].Elsevier Ltd,UK,2003 |
| [21] | Bruet B J F;Song J;Boyce M C et al.Materials design principles of ancient fish armor[J].NATURE MATERIALS,2008,7(09):748-756. |
| [22] | Sharon E;Gross S P;Fineberg J .Energy dissipation in dynamic fracture[J].Physical Review Letters,1996,76(12):2117-2120. |
| [23] | 赵先锐,左敦稳,程虎,李勤涛,戴晟,冯尚申.塑料模具钢表面激光熔覆WxC/Ni基合金涂层的组织及性能[J].材料热处理学报,2013(04):177-181. |
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