Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material最新文献

Microstructure of AISI 304 stainless steel strips produced by a twin-roll caster 双辊连铸机生产AISI 304不锈钢带钢的显微组织

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60270-4

Chenxi Ji , Jiongming Zhang , Fuxiang Huang , Xinhua Wang , Yuan Fang , Yan Yu

引用次数: 2

Modeling texture development during cold rolling of IF steel by crystal plasticity finite element method 用晶体塑性有限元法模拟中钢冷轧过程织构发展

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60273-X

Hejie Li , Jingtao Han , Huachun Pi , Zhengyi Jiang , Dongbin Wei , A. Kiet Tieu

{"title":"Modeling texture development during cold rolling of IF steel by crystal plasticity finite element method","authors":"Hejie Li , Jingtao Han , Huachun Pi , Zhengyi Jiang , Dongbin Wei , A. Kiet Tieu","doi":"10.1016/S1005-8850(08)60273-X","DOIUrl":"10.1016/S1005-8850(08)60273-X","url":null,"abstract":"<div><p>With the consideration of slip deformation mechanism and various slip systems of body centered cubic (BCC) metals, Taylor-type and finite element polycrystal models were embedded into the commercial finite element code ABAQUS to realize crystal plasticity finite element modeling, based on the rate dependent crystal constitutive equations. Initial orientations measured by electron backscatter diffraction (EBSD) were directly input into the crystal plasticity finite element model to simulate the development of rolling texture of interstitial-free steel (IF steel) at various reductions. The modeled results show a good agreement with the experimental results. With increasing reduction, the predicted and experimental rolling textures tend to sharper, and the results simulated by the Taylor-type model are stronger than those simulated by finite element model. Conclusions are obtained that rolling textures calculated with 48 {110}〈111〉+{112}〈111〉+{123}〈111〉 slip systems are more approximate to EBSD results.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 6","pages":"Pages 696-701"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60273-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74803058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Optimizing SUS 304 wire drawing process by grey relational analysis utilizing Taguchi method 利用田口法对sus304拉丝工艺进行灰色关联分析优化

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60276-5

Al-Refaie Abbas , Ming-Hsien Li , Kuo-Cheng Tai

{"title":"Optimizing SUS 304 wire drawing process by grey relational analysis utilizing Taguchi method","authors":"Al-Refaie Abbas , Ming-Hsien Li , Kuo-Cheng Tai","doi":"10.1016/S1005-8850(08)60276-5","DOIUrl":"10.1016/S1005-8850(08)60276-5","url":null,"abstract":"<div><p>In the stainless steel 304 (SUS 304) wire drawing process, optimizing the die life and wire tensile strength, which are the larger-the-better quality characteristics (QCH) types, is of main interest. Three control factors, involving reduction ratio, lubricant temperature, and drawing speed, were investigated utilizing L<sub>9</sub>(3<sup>4</sup>) orthogonal array (OA). The grey relational analysis was conducted for the normalized signal-to-noise (S/N) ratios. The ordinal value of the grey grade was then used to decide optimal factor levels. The anticipated improvements in die life and wire tensile strength were estimated 25.31 h and 22.50 kg/mm<sup>2</sup>, respectively. To decide the significant factor which had effect on each QCH and predict the average value of each QCH, analysis of variance (ANOVA) was performed for S/N ratio and QCH. Confirmation experiments were then conducted, where a good overlap was noticed between the predicted and confirmation intervals for each QCH. The Hotelling <em>T</em><sup>2</sup> and the sample generalized variance control charts were finally utilized in controlling and monitoring future production. In conclusion, the grey relational analysis utilizing Taguchi method is an effective approach for optimizing the die life and wire tensile strength for SUS wire drawing process.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 6","pages":"Pages 714-722"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60276-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75799744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Characterization of microstructure evolution and mechanical properties of the spray-deposited AZ31 magnesium alloy 喷涂AZ31镁合金组织演变及力学性能表征

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60280-7

Yongbing Li , Jinfeng Huang , Hua Cui , Kai Tao , Kui Zhang , Jishan Zhang

{"title":"Characterization of microstructure evolution and mechanical properties of the spray-deposited AZ31 magnesium alloy","authors":"Yongbing Li , Jinfeng Huang , Hua Cui , Kai Tao , Kui Zhang , Jishan Zhang","doi":"10.1016/S1005-8850(08)60280-7","DOIUrl":"10.1016/S1005-8850(08)60280-7","url":null,"abstract":"<div><p>The cylindrical billets of a Mg-3Al-1Zn (AZ31) alloy were synthesized by spray deposition processing. The microstructure evolution and mechanical properties of the alloy were investigated. The results reveal that the microstructure of the AZ31 alloy is refined significantly by spray deposition processing. A homogeneous and equiaxial-grain structure with an average grain size of 17 μm is obtained. Further grain refinement with an average grain size of 5 μm is attributed to dynamic recrystallization during extrusion processing. The great increase in the density of grain boundary nucleation sites by the finer initial grain sizes makes the dislocation pile-ups near subgrain boundaries being absorbed easily by the boundaries, resulting in an accelerated recrystallization process. The average tensile ultimate and yield strengths of the extruded rods are 321 MPa and 237 MPa, respectively, with an elongation of 15.2% at room temperature, which are remarkably higher than those of the conventional as-cast AZ31 alloy.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 6","pages":"Pages 740-746"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60280-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88626099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Comparison of room-temperature multiferroics in Bi4Fe2TiO12 film and bulk Bi4Fe2TiO12薄膜和体块中室温多铁性的比较

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60287-X

Jun Lu, Lijie Qiao, Wuyang Chu

引用次数: 4

Effect of chemical vapor infiltration treatment on the wave-absorbing performance of carbon fiber/cement composites 化学蒸汽渗透处理对碳纤维/水泥复合材料吸波性能的影响

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60292-3

Kezhi Li, Chuang Wang, Hejun Li, Lingjun Guo, Jihua Lu

引用次数: 6

Influences of microstructure and texture on crack propagation path of X70 acicular ferrite pipeline steel 组织和织构对X70针状铁素体管线钢裂纹扩展路径的影响

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60271-6

Hao Yu

引用次数: 25

Preparation and properties of dental zirconia ceramics 牙科氧化锆陶瓷的制备及性能研究

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60284-4

Xinjie Liang , Yuexiu Qiu , Shaoxiong Zhou , Xiaoyang Hu , Guangyan Yu , Xuliang Deng

{"title":"Preparation and properties of dental zirconia ceramics","authors":"Xinjie Liang , Yuexiu Qiu , Shaoxiong Zhou , Xiaoyang Hu , Guangyan Yu , Xuliang Deng","doi":"10.1016/S1005-8850(08)60284-4","DOIUrl":"10.1016/S1005-8850(08)60284-4","url":null,"abstract":"<div><p>Y<sub>2</sub>O<sub>3</sub>-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics with high-performance were prepared for dental application by use of the micro-emulsion and two-step sintering method. The crystal phase, morphology, and microstructure of the reaction products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). XRD results show that the ceramics mainly consist of tetragonal zirconia. Physical and mechanical properties test results show that the bending strength, fracture toughness, and the density of full sintered Y-TZP ceramics are 1150 MPa, 5.53 MPa·m<sup>1/2</sup>, and 6.08 g/cm<sup>3</sup>, respectively, which suggest that the material is relatively suitable for dental restoration. The dental base crown machined with this material by CAD/CAM system exhibits a verisimilitude configuration and the material's expansion coefficient well matches that of the glaze. These results further indicate that the product can be used as a promising new ceramic material to fabricate dental base crowns and bridges.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 6","pages":"Pages 764-768"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60284-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83008924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Effect of solution cooling rate on the γ′ precipitation behaviors of a Ni-base P/M superalloy 固溶冷却速率对ni基P/M高温合金γ′析出行为的影响

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60278-9

Gaofeng Tian, Chengchang Jia, Ying Wen, Benfu Hu

引用次数: 19

Novel foaming agent used in preparation process of aluminum foams 新型发泡剂在泡沫铝制备中的应用

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI: 10.1016/S1005-8850(08)60279-0

Xiangyang Zhou, Xiquan Liu, Jie Li, Hongzhuan Liu

引用次数: 4