段冰冰,王治国,蔡晋,李威,司朝润.钛合金表面纳米化强化研究进展[J].表面技术,2021,50(12):202-216, 245.
DUAN Bing-bing,WANG Zhi-guo,CAI Jin,LI Wei,SI Chao-run.Research Progress on Surface Nanocrystallization Strengthening of Titanium Alloys[J].Surface Technology,2021,50(12):202-216, 245 |
| 钛合金表面纳米化强化研究进展 |
| Research Progress on Surface Nanocrystallization Strengthening of Titanium Alloys |
| 投稿时间：2020-11-27 修订日期：2021-03-25 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.12.021 |
| 中文关键词: 表面纳米化 钛合金 纳米化机理 微观组织 表面性能 |
| 英文关键词:surface nanocrystallization titanium alloy nanocrystallization mechanism microstructure surface properties |
| 基金项目:西北工业大学研究生种子基金项目(CX2020105);中国航发产学研合作项目(HFZL2019CXY024-1);中央高校业务费项目(G2018KY0302) |
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| Author | Institution |
| DUAN Bing-bing | School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China |
| WANG Zhi-guo | AVIC Xi’an Aircraft Industry Group Company Ltd., Xi’an 710089, China |
| CAI Jin | College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China |
| LI Wei | College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China |
| SI Chao-run | School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China |
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| 中文摘要: |
| 钛及钛合金因具有密度小、比强度高、耐腐蚀性能好等优点，在航空航天领域得到了广泛应用。表面纳米化是在材料表面形成一层由纳米级颗粒或晶粒组成的强化层，从而改善金属材料的表面性能，具有普适性好、工艺简单等独特优势。对钛及钛合金进行表面自纳米化处理后，其表层产生了剧烈的塑性变形，在材料中形成了独特的梯度纳米结构层，分别为剧烈变形层、亚微米细晶层、粗晶应变层和基体层，表层组织结构的改变也会导致钛合金表层性能产生变化。首先，对表面涂层或沉积、表面自纳米化以及混合纳米化3种金属表面纳米化方法进行了简要概述，分析了各自优缺点以及目前存在的问题。其次，着重论述了孪晶和位错在钛合金自纳米化过程中所起的关键作用，探讨了α、α+β、β 3种类型钛合金纳米化机理存在的差异，对钛合金表面纳米化机理的研究现状进行了归纳总结，在此基础上，重点介绍了表面纳米化处理对钛合金表层性能的影响，主要包括近年来关于硬度与残余应力、疲劳、腐蚀、磨损、扩散性能的影响及研究现状，并对其强化机制进行了分析。最后，归纳总结了现有钛合金表面纳米化研究存在的不足，对今后的研究工作进行了展望，并提出应将表面纳米化技术与数字化仿真技术、渗氮等工艺结合，发展数字化、复合强化技术，以期为表面纳米化技术在钛合金领域的发展研究提供有价值的参考。 |
| 英文摘要: |
| Titanium and titanium alloys have been widely used in aerospace field because of their low density, high specific strength and good corrosion resistance. Surface nanocrystallization is to form a strengthening layer composed of nano-sized particles or grains on the surface of materials by certain technical means, so as to improve the surface properties of metal materials. Because of its unique advantages of good universality and simple process, it has become a research hotspot in the field of surface strengthening in recent years. Severe plastic deformation occurs on the surface of titanium and titanium alloy after self-nanocrystallization treatment, resulting in the formation of a unique gradient nanostructure layer in the material, which are sharply deformed layer, submicron fine grain layer, coarse grain deformation layer and matrix layer, respectively. the change of surface structure will also lead to changes in the surface properties of titanium alloy. In this paper, three surface nanocrystallization methods of surface coating or deposition, surface self-nanocrystallization and mixed nanocrystallization are briefly summarized, and their advantages and disadvantages and existing problems are analyzed. secondly, the key role of twins and dislocations in the self-nanocrystallization process of titanium alloys is discussed, and the differences of nanocrystallization mechanisms of α, α+β and β titanium alloys are discussed. The research status of surface nanocrystallization mechanism of titanium alloy is summarized. On this basis, the effects of surface nanocrystallization on the surface properties of titanium alloys are introduced, including the effects of hardness and residual stress, fatigue, corrosion, wear and diffusion properties in recent years, and the strengthening mechanism is analyzed. Finally, the shortcomings of the existing research on surface nanocrystallization of titanium alloys are summarized, and the future research work is prospected. It is also proposed that the surface nanocrystallization technology should be combined with digital simulation technology and nitriding technology to develop digital and composite strengthening technology, so as to provide valuable reference for the development and research of surface nanocrystallization technology in the field of titanium alloy. |
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