Surface Nanostructure of Anealled 40Cr Steel by Supersonic Particles Bombarding treatment

摘要：

A nanostructured layer can be introduced on the surface of metallic materials by surface severe plastic deformation. A surface severe plastic deformation method-Supersonic Particles Bombarding (SSPB) was used to treat the anealled 40Cr steel. The surface and cross sectional microstructure of 40Cr steel after SSPB treatment were characterized by means of X-ray diffraction, optical microscopy and transmission electron microscopy equipped with a Kikuchi line program to determine the grain orientations. Equiaxed nanocrystallites with random crystallographic orientation were obtained on the top surface of 40Cr steel after SSPB treatment. The surface microstructure was composed of nanostructure area, deformed area and matrix. Geometrically necessary boundaries and incidental dislocation boundaries were formed in the deformed ferrite at the distance to the surface of about 50-60μm, and the original coarse ferrite grain was divided into lamaller structure.

关键词： Supersonic Particles Bombarding (SSPB) 40Cr steel grain orientation geometrically necessary boundaries(GNBs) incidental dislocation boundaries (IDBs)

作者: Yuliang Liu Tianying Xiong

作者单位: School of Materials Science and Engineering, Henan University ofScience and Technology, Luoyang, Chi Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 291-295

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）