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Effect of Process Parameters on Defects, Melt Pool Shape, Microstructure, and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser MeltingHua-Zhen Jiang1,2,Zheng-Yang Li2,Tao... of the corresponding dimensional quantities,are adopted in this study to examine the defects,melt pool shape,and primary dendrite spacing of the SLM-manufactured 316 L stainless steel,because it reflects......
Ti-IF钢冷轧缺陷的形成分析吴维双1,刘建华1,王敏1,崔衡1,包燕平1(1.北京市北京科技大学 冶金与生态工程学院)摘 要:对某钢厂生产的Ti-IF钢冷轧板的表面缺陷进行研究,利用扫描电镜和能谱仪分析其缺陷部位微观形貌及夹杂物成分,在缺陷部位发现大量氧化铝,硅铝酸盐,氧化硅,镁铝尖晶石夹杂物.此外,对夹杂物含量较高的头坯试样进行轧制模拟试验,分析结果进一步证实了由于各类夹杂物的存在导致Ti-IF钢冷轧板的表面缺陷.关键词:Ti-IF钢; 冷轧板缺陷; 夹杂物; 轧制模拟; 孔洞; 起皮; 凹痕......
Roles of crystal defects in the persistent luminescence of Eu2+, Dy3+ co-doped strontium aluminate based phosphorsLü Xingdong1) and SHU Wangen2) 1) School of Materials, Jiangxi University of Finance... of different point defects in persistent luminescence of SrAl2O4:Eu,Dy phosphors were investigated. The research results showed that DySi r plays an important role in the persistent luminescence of SrAl2O4:Eu......
Bonding Character and Formation Energy of Point Defects of He and Vacancy on (001) Surface of bcc Iron by First Principle CalculationsJun CAI,Daogang LUSchool of Nuclear Science and Engineering... by deformation mechanism of charge densities and electronic densities of states. It is found that formation energy of the point defects from the topmost SAL to bulk-like atomic layer increase gradually......
Mesoporous Bioglass/Silk Fibroin Scaffolds as a Drug Delivery System: Fabrication, Drug Loading and Release in vitro and Repair Calvarial Defects in vivo张晓欣,ZHANG Jiayin,施斌Hospital of Stomatology... to carry out in vitro tests and repair BALB/C mice calvarial defects. Bone formation was examined by microcomputed tomography. The experimental results show that MBG/silk scaffolds have better......
Hydroxyapatite/β-tricalcium Phosphate Composite for Guiding Bone Tissue Growth into a Titanium Tube in 8 mm Dog Tibia Cavity Defects朱继翔1,陈晓明1,WANG Jing2,CHEN Weimin31. Department of Biomedical...-TCP)composite filling(group A),chitosan/calcium phosphate composite filling(group B),and HAP particle modification(group C).After 2 and 5 months of implantation in dog tibia defects,new bone......
Experimental Investigation on the LCF Behavior Affected by Manufacturing Defects and Creep Damage of One Selective Laser Melting Nickel-Based Superalloy at 815℃Xiao-An Hu1,2,Gao-Le Zhao1,2,Yun Jiang1,2,Xian-Feng Ma3,Fen-Cheng Liu4,Jia Huang5,Cheng-Li Dong61. School of Aircraft Engineering,Nanchang Hangkong University2. Jiangxi Key Laboratory of Micro Aeroengine Technology3. Sino-French Institute......
forward. Key words: friction stir welding; onion rings structure; plastic flow; tunnel type defects 搅拌摩擦焊(friction stir welding, 即FSW) 是目前最具有吸引力的一种新型材料连接方法, 与常规熔焊相比, 它具有明显的优点, 已经开始广泛应用于...高时, 搅拌针向前移动就会 图6 FSW紫铜接头隧道型缺陷周围层流现象 Fig.6 Trace of plastic layers flow around tunneltype defects in FSW joint of copper 图7 FSW紫铜小孔处的塑性金属流动轨迹 Fig.7 Trace of plastic metal......
Structure simulation in unidirectionally solidified turbine blade by dendrite envelope tracking model (Ⅱ): model validation and defects prediction WANG Tong-min(王同敏)1, 2, SU Yan-qing(苏彦庆)2, GUO... alloy of Sn-21%Bi(mole fraction). It was also applied to predict the structure defects (e.g. stray grain) of unidirectionally solidified turbine blade. The results show that the developed model......
A Study on S.R.Topography of the Structural Defects in High-Jc Superconducting YBaCuO Crystal Prepared by the MTG Technique王超群,王瑞坤,任洪涛,周贻如,肖玲,贺庆,张建国,刘安生,俞定安,姜晓明,赵际勇摘 要:<正> It is well known that for technological application,a great effort has been done to enchance Jc value ofsuperconducting YBaCuO sintered bulk.Except oxygen content,the main......