Rapid Preparation and Characterization of the Surface Microstructures of AISI 304L Austenitic Stainless Steel by High-Current Pulsed Electron Beam
-
摘要: 利用强流脉冲(HCPEB)电子束技术,对AISI 304L奥氏体不锈钢进行了辐照处理,并利用透射电子显微镜对HCPEB诱发的空位簇缺陷进行了表征。实验结果表明,HCPEB辐照金属可在辐照表层诱发大量的过饱和空位,并形成空位型位错圈和堆垛层错四面体(SFT)。利用金相显微镜、扫描电子显微镜和非接触式光学轮廓仪,对其表面形貌进行了详细的表征,发现电子束处理后的样品表面形成了高密度、弥散分布和尺寸细小的微孔,表面微孔是由于HCPEB轰击诱发的大量空位(簇)缺陷,以线或面等结构缺陷为路径,向表层迁移导致空位的累积而形成的。采用HCPEB技术,选择合适的材料和辐照工艺参数,可以成功地制备出表面多孔金属材料。Abstract: High-current pulsed electron beam (HCPEB) technique was used to irradiate the AISI 304L austenitic stainless steel. The vacancy defect clusters of the irradiated surface layer were investigated by using transmission electron microscopy. The experimental results indicated that a large number of supersaturation vacancies involving vacancy dislocation loops and stacking fault tetrahedra (SFT) were induced on the irradiated surface layer after HCPEB irradiation. Additionally, surface morphologies of the irradiated samples were characterized by optical microscope, scanning electron microscope and non-contact optical profiler in detail. It was found that high density, fine and dispersed micropores were inevitably formed. The dominating formation mechanism of surface micropores should be attributed to the migration of large number of vacancies (clusters) defect along line and (or) surface structure defects towards the irradiated near-surface layer during HCPEB bombardment and cause vacancies accumulation. The present results indicate that HCPEB technique is a new method to successfully fabricate the surface porous metallic materials by selecting appropriate materials and adjusting HCPEB process parameters.
-
Yadroitsev I, Shishkovsky P, Bertrand I. Manufacturing of fine-structured 3D porous filter elements by selective laser melting [J]. Appl Surf Sci, 2009, 255(10): 5523-5527. Tomimura K, Hamano Y, Honda R. Experimental study on multi-layered type of gas-to-gas heat exchanger using porous media [J]. Int J Heat Mass Tran, 2004, 47(21): 4615-4623. Wang J, Yu R J. Preparation of middle-hollow round catalysis carrier [J]. Shandong Chemical Industry, 2009, 38(6): 1-2. (in Chinese) 王捷, 于如军. 球形中空催化剂载体的制备 [J]. 山东化工, 2009, 38(6): 1-2. Kumar, Vinay. Load-carrying capacity of plain finite partial journal bearings in the turbulent regime [J]. Wear, 1980, 58(2): 261-273. Fan L B, Cong P L. A design of shock absorption buffer [J]. Technology for Earthquake Disaster Prevention, 2009, 4(3): 347-354. (in Chinese) 范雷彪, 丛陪历. 减震缓冲器的设计构想 [J]. 赈灾防御技术, 2009, 4(3): 347-354. Mehdizadeh O Z, Paraschivoiu M. A three-dimensional finite element approach for predicting the transmission loss in mufflers and silencers with no mean flow [J]. Appl Acoust, 2005, 66(8): 902-918. Zhang K M, Zou J X, Grosdidier T, et al. Formation and evolution of craters in carbon steels during low-energy high-current pulsed electron-beam treatment [J]. J Vac Sci Tech A, 2009, 27: 1217-1226. Li Y, Gu Q Q, Qiu D H, et al. Texture and structural defect evolution of pure nickel subjected to high-current pulse electron beam irradiation [J]. Chinese Journal of High Pressure Physics, 2010, 24(6): 461-466. (in Chinese) 李艳, 顾倩倩, 邱冬华, 等. 强流脉冲电子束作用下纯镍表层中组织及结构缺陷的演化行为 [J]. 高压物理学报, 2010, 24(6): 461-466. Qiu D H, Cheng D Q, Guan Q F, et al. Surface stress characteristics in pure nickel after high-current pulsed electron beam irradiation [J]. Chinese Journal of High Pressure Physics, 2009, 23(5): 321-326. (in Chinese) 邱冬华, 程笃庆, 关庆丰, 等. 强流脉冲电子束作用下纯镍表面应力特征 [J]. 高压物理学报, 2009, 23(5): 321-326. Hao S Z, Wu P S, Zhang X D, et al. Surface modification by high current pulsed electron beam [J]. Heat Treatment of Metals, 2008, 33(1): 77-81. (in Chinese) 郝胜智, 吴平生, 张向东, 等. 强流脉冲电子束表面处理 [J]. 金属热处理, 2008, 33(1): 77-81. Guan Q F, An C X, Qin Y, et al. Microstructure induced by stress generated by high-current pulsed electron beam [J]. Acta Phys Sin, 2005, 54(8): 3927-3933. (in Chinese) 关庆丰, 安春香, 秦颖, 等. 强流脉冲电子束应力诱发的微观结构 [J]. 物理学报, 2005, 54(8): 3927-3933. Cheng D Q, Guan Q F, Zhu J, et al. Mechanism of surface nanocrystallization in pure nickel induced by high-current pulsed electron beam [J]. Acta Phys Sin, 2009, 58(10): 7300-7306. (in Chinese) 程笃庆, 关庆丰, 朱健, 等. 强流脉冲电子束诱发纯镍表层纳米结构的形成机制 [J]. 物理学报, 2009, 58(10): 7300-7306. Wang X T, Guan Q F, Qiu D H, et al. Defect microstructures in polycrystalline pure copper induced by high-current pulsed electron beam-The vacancy defect clusters and surface micropores [J]. Acta Phys Sin, 2010, 59(10): 7252-7256. (in Chinese) 王雪涛, 关庆丰, 邱冬华, 等. 强流脉冲电子束作用下金属纯Cu的微观结构状态--空位簇缺陷及表面微孔结构 [J]. 物理学报, 2010, 59(10): 7252-7256. Qin Y, Dong C, Wang X G, et al. Temperature profile and crater formation induced in high current pulsed electron beam processing [J]. J Vac Sci Tech A, 2003, 21(6): 1934-1938. Qin Y, Wang X G, Dong C, et al. Temperature field and formation of crater on the surface induced by high current pulsed electron beam bombardment [J]. Acta Phys Sin, 2003, 52(12): 3043-3046. (in Chinese) 秦颖, 王晓钢, 董闯, 等. 强流脉冲电子束诱发温度场及表面熔坑的形成 [J]. 物理学报, 2003, 52(12): 3043-3046. Guan Q F, Zhang Q Y, Dong C. Physical model of stress and deformation microstructures in AISI 304L austenitic stainless steel induced by high-current pulsed electron beam surface irradiation [J]. ISIJ Int, 2008, 48: 235-239. Cheng X W, Guan Q F, Fan X H, et al. Effect of vacancy defect clusters on the optical property of the aluminium filter used for the space solar telescope [J]. Chin Phys B, 2010, 19(1): 6103. Kiritani M. Story of stacking fault tetrahedral [J]. Mater Chem Phys, 1997, 50(2): 133-138.
点击查看大图
计量
- 文章访问数: 7461
- HTML全文浏览量: 369
- PDF下载量: 264