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nanocrystallization is well known as one of important methods to improve surface properties. The thermal stability of nanocrystalline microstructures was related to their preparation and application...:commercially pure titanium; surface nanocrystallization; high-energy shot peening; thermal stability; [全文内容正在添加中] ......
of austenite and dissolution of cementite maybe occur in the process of ultrasonic particulate peening. 关键词:microstructure; ultrasonic particulate peening; surface nanocrystallization; nanocrystalline...Characterization of Nanocrystallizatin Surface Layer of 0.4C-1Cr Low Alloy Steel Prepared by Ultrasonic Particulate Peening ZHANG Jun-bao1,LIU Yu-liang2,XIONG Tian-ying2,SONG Hong-wei1,WU Jie2,ZHAO......
technology and metal surface nanocrystallization, etc. Many scientific issues have been continuously discovered. Meanwhile they have been applied in the practice more and more, and have archived...Nano Surface Engineering in the 21st Century Xu Yi1,Xu Bin-shi1,SHI Pei-jing1,WANG Hai-dou1,DONG Shi-yun1 (1.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering......
, 01122980.2[P]. 2002-02-20. [16] TAO Nai-rong, WANG Zhen-bo, TONG Wei-ping, et al. An investigation of surface nanocrystallization mechanism in Fe by surface mechanical attrition treatment[J]. Acta... 刚, 黑祖昆, 等. 表面机械研磨又道AISI304不锈钢表面层纳米化[J]. 金属学报, 2003, 39(4): 342-350. ZHANG Hong-wang, LIU Gang, HEI Zu-kun, et al. Surface nanocrystallization of AISI 304 stainless steel induced by surface mechanical......
behaviour of the coatings before and after laser crystallization were evaluated by measurements of hardnesses of coating surface and cross-section, and by unlubricated friction and wear experiments... protection, which provides the possibility for application of industrialized production. Key words: electroless plating; Ni-P/Ni-W-P duplex coating; laser treatment; adhesive wear; nanocrystallization 1......
剪切变形方式下低碳钢表面纳米结构的形成刘刚1,莫成刚1,武保林2,左良1(1.辽宁省沈阳市东北大学研究院2.沈阳航空航天大学 材料工程系,辽宁沈阳 110136)摘 要:对低碳钢板材进行表面球磨处理,利用电子显微术研究剪切变形方式下深度方向的组织演变.结果表明,低碳钢的纳米化过程包括:位错通过增殖,运动,湮灭和重组形成位错墙;位错墙逐渐转变成小角度和大角度晶界,将原始粗晶分割成亚微晶;亚微晶内重复上述过程使晶粒继续细化,最终形成等轴状,取向接近随机分布的纳米晶组织.外力作用方向并未改变纳米化过程,但会影响变形层......
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is changed from about 20nm to 100nm. In the surface layer of 20-50μm in depth, the microstructure consists of submicron grains. The surface nanocrystallization is accomplished by dislocation slip...; high-energy shot peening; surface nanocrystallization; microstructure; microhardness CLC number: TG113.1; TG146.2  ......
, and the structure of the treated samples was examined using Mssbauer spectroscopy, XRD and TEM. Experimental results showed that nanocrystallization occurs in the amorphous Fe 73.5 Cu 1Nb 3Si 13.5 B... atoms in the residual amorphous remains the in plane anisotropy, in spite of bulk nanocrystallization. In contrast with the result by comparable isothermal annealing, it was concluded......
Nanocrystallization of α-Fe Crystals in Fe52Cr18Mo7B16C4Nb3 Bulk Amorphous AlloyS. Ahmadi,H.R. Shahverdi,S.S. SaremiFaculty of Engineering, Department of Materials Science, Tarbiat Modares University摘 要:Crystallization kinetics of Fe52Cr18Mo7B16C4Nb3 alloy was evaluated by X-ray diffraction(XRD),differential scanning calorimetric(DSC) tests......