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纯钛表面梯度纳米结构的微观组织研究
Research on the Microstructure of Surface Gradient Nanostructure on Pure Titanium
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- DOI:
- 作者:
- 屠 涛 1 ， 2 ，田 军 1 ， 2 ，李积珍 3 ，代 盼 4 ，徐春杰 2 ， 5
TU Tao 1,2 , TIAN Jun 1,2 , LI Jizhen 3 , DAI Pan 4 , XU Chunjie 2,5
- 作者单位:
- 1. 镁高镁诺奖（铜川）新材料有限公司，陕西 铜川 727031；2.西安谢赫特曼诺奖新材料研究院，陕西 西安 710048；3. 西 安北方庆华机电有限公司，陕西 西安 710025；4. 西安石油大学 材料科学与工程学院，陕西 西安 710065；5. 西安理工大 学 材料科学与工程学院，陕西 西安 710048
(1. Meigaomei Nobel Prize (Tongchuan) New Materials Co., Ltd., Tongchuan 727031, China; 2. Xi'an Shechtman Nobel Prize New Materials Institute, Xi'an 710048, China; 3. Xi'an North qinghua mechanical and electrical co., Ltd., Xi'an 710025, China; 4. China School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China; 5. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
- 关键词:
- 纯钛；梯度纳米结构；微观组织
pure titanium; gradient nanostructure; microstructure
- 摘要:
- 通过机械碾磨加工手段对纯钛表面进行纳米化处理，表征了纯钛表面梯度纳米结构的微观组织变化，探究
了其表面纳米化的变形机理。 结果表明：纯钛经过机械碾磨后，随着距表面距离的增加，晶粒尺寸由纳米级增大至宏观
尺度，且呈现连续梯度变化，其中细晶层及变形层深度分别约为 30 μm 及 110 μm ，在机械碾磨过程中细小的孪晶片层
的深度细化主要是通过机械剪切碎化形成大量无序的亚微晶粒，这些亚微晶粒通过形核再结晶所实现。
The gradient nano-treatment was carried out on the surface of pure titanium by mechanical milling. The
microstructure changes of the gradient nano-structure on the surface of pure titanium were characterized and the
deformation mechanism of the surface nano-treatment was discussed. The results show that with the increase of the distance
from the surface, the grain size of pure titanium milled by mechanical milling increases from nano-scale to macro-scale
with a continuous gradient change, and the depth of fine grain layer and deformation layer is about 30 μm and 110 μm,
respectively. The deep refinement of fine twin lamellae in the mechanical milling process is mainly by mechanical shear
cutting to form a large number of disordered submicrograins, which are realized by nucleation and recrystallization.