稀有金属材料与工程最新文献_第7页

Failure Mechanisms of Ti-Al3Ti metal-Intermetallic Laminate Composites Under High-Speed Impact 高速冲击下Ti-Al3Ti金属间层合复合材料的失效机理

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30197-8

Fan Xueling , Yuan Meini , Qin Qiang

引用次数: 10

Effect of Nb Solute Concentration on Crystallite Size Refinement and Strength Enhancement in Mechanically Alloyed Cu-Nb Alloys Nb溶质浓度对Cu-Nb机械合金化合金晶粒细化和强度增强的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30196-6

Lei Ruoshan , Chen Guangrun , Wang Mingpu

{"title":"Effect of Nb Solute Concentration on Crystallite Size Refinement and Strength Enhancement in Mechanically Alloyed Cu-Nb Alloys","authors":"Lei Ruoshan , Chen Guangrun , Wang Mingpu","doi":"10.1016/S1875-5372(18)30196-6","DOIUrl":"10.1016/S1875-5372(18)30196-6","url":null,"abstract":"<div><p>Cu-Nb alloys with a Nb concentration range of 0 wt%∼30 wt% were prepared by mechanical alloying (MA) at room temperature. The effects of Nb content on the crystalline refinement process and mechanical properties of the immiscible Cu-Nb system were investigated by X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM) with energy-dispersive X-ray detection (EDX), transmission electron microscopy (TEM) and microhardness measurement. Results show that the completed dissolution of Nb in Cu can be achieved in the samples with Nb content less than ∼11 wt% after 100 h milling, although the equilibrium solubility level is nearly zero. The grain size refinement capability of MA-ed Cu-Nb powder is enhanced with increasing Nb content up to 30 wt%. This is because the susceptibility to recovery process becomes reduced, when the amount of Nb solutes segregated into the dislocation of Cu phase is increased. Cu-30wt%Nb powder milled for 100 h, the average Cu grain size is only ∼6 nm. The microhardness of the samples shows an enhancement with increasing Nb concentration. The main strengthening mechanisms of the MA-ed Cu-Nb alloys are linked to the grain size reduction and the dissolution of Nb into Cu matrix.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 9","pages":"Pages 2607-2614"},"PeriodicalIF":0.7,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30196-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78031758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Biocompatible MgO Film on Titanium Substrate Prepared by Sol-gel Method 溶胶-凝胶法制备钛基生物相容性MgO膜

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30206-6

Yu Shunzhi, Li Zhonghai, Han Liwei, Zhao Yantao, F. Tao

引用次数: 6

Microstructural Characterization and Growth Kinetics of the Reaction Layer in U-10wt% Zr/Zircaloy-4 Diffusion Couples U-10wt% Zr/Zircaloy-4扩散偶联反应层的微观结构表征和生长动力学

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30208-X

Zhang Yuting, W. Xin, Liu Pengchuang, Zeng Gang, Pang Xiaoxuan, J. Jianping, Sheng Liusi, Z. Pengcheng

引用次数: 0

Microstructural Characterization and Growth Kinetics of the Reaction Layer in U-10wt% Zr/Zircaloy-4 Diffusion Couples U-10wt% Zr/Zircaloy-4扩散偶联反应层的微观结构表征和生长动力学

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30208-X

Zhang Yuting , Wang Xin , Liu Pengchuang , Zeng Gang , Pang Xiaoxuan , Jia Jianping , Sheng Liusi , Zhang Pengcheng

引用次数: 0

Evolution of Microstructure in Al-Mn Alloy with a Low Ratio of Fe/Si During Homogenization 低铁硅比Al-Mn合金均匀化过程中组织演变

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30200-5

Hu Ting , Yin Dengfeng , Yu Xinxiang , Cheng Rence , Cao Hanquan

引用次数: 2

Effect of Rare Earth Pr on Creep Behavior of Sn-0.3Ag-0.7Cu-0.5Ga Low-Ag Solder Alloys 稀土Pr对Sn-0.3Ag-0.7Cu-0.5Ga低银钎料合金蠕变行为的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-09-01 DOI: 10.1016/S1875-5372(18)30205-4

Wang Bo , Xue Songbai , Wang Jianxin , Long Weimin , Zhang Qingke

{"title":"Effect of Rare Earth Pr on Creep Behavior of Sn-0.3Ag-0.7Cu-0.5Ga Low-Ag Solder Alloys","authors":"Wang Bo , Xue Songbai , Wang Jianxin , Long Weimin , Zhang Qingke","doi":"10.1016/S1875-5372(18)30205-4","DOIUrl":"https://doi.org/10.1016/S1875-5372(18)30205-4","url":null,"abstract":"<div><p>For development of low-Ag lead free solder alloys for microelectronic packaging, the correlation of creep properties with microstructure of novel Sn-0.3Ag-0.7Cu-0.5Ga (SAC-Ga) solder alloys bearing Pr has been investigated using nanoindentation. The results show that the creep deformation of SAC-Ga, SAC-Ga-0.06Pr, SAC-Ga-0.5Pr is 1717, 1144, and 1472 nm, respectively, which indicates that Pr addition could significantly enhance the creep resistance of SAC-Ga solders due to the refinement and uniform distribution of Cu<sub>6</sub>Sn<sub>5</sub> intermetallic compounds (IMCs). However, compared with the SAC-Ga-0.06Pr solder alloy, the SAC-Ga-0.5Pr alloy shows poorer creep resistance which is mainly attributed to the surface oxidation of excess rare earth Pr. In addition, Dorn model has been used to describe the creep behavior and to obtain stress exponents of the SAC-Ga solder alloys bearing Pr. The strengthening mechanism of creep resistance in SAC-Ga solder alloys bearing Pr is that when encountering refined and well-distributed Cu<sub>6</sub>Sn<sub>5</sub> IMCs, a dislocation line cannot climb through the IMCs but bypass the IMCs, thus leading to a decrease in the creep deformation of the solder alloys bearing Pr.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 9","pages":"Pages 2657-2662"},"PeriodicalIF":0.7,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30205-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91691411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Effect of Welding Speed on Fatigue Properties of TC18 Thick Plate by Electron Beam Welding 焊接速度对TC18厚板电子束焊接疲劳性能的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-08-01 DOI: 10.1016/S1875-5372(18)30188-7

Han Wen , Fu Li , Chen Haiyan

{"title":"Effect of Welding Speed on Fatigue Properties of TC18 Thick Plate by Electron Beam Welding","authors":"Han Wen , Fu Li , Chen Haiyan","doi":"10.1016/S1875-5372(18)30188-7","DOIUrl":"10.1016/S1875-5372(18)30188-7","url":null,"abstract":"<div><p>The welding of 15 mm thick TC18 titanium alloy thick plate was realized by electron beam welding. The effect of different welding speeds (10, 20, 30 mm/s) on the fatigue properties of the electron beam welded joints for TC18 titanium alloy was investigated. The macroscopic morphology, microstructure and fracture characteristics of the joints were analyzed by optical microscope, scanning electron microscopy and transmission electron microscopy, and the fatigue properties of welded joints were studied and tested by an electronic universal testing machine. The results show that the weld fusion zone is mainly composed of columnar <em>β</em> phase and acicular <em>α</em> martensite phase. The upper melting width, the middle melting width and the lower melting width are obviously reduced, and the grain size gradually decreases with the increase of welding speed, which results in the increase of fatigue properties of welded joints. At <em>N</em><sub>f</sub> =10<sup>7</sup> the fatigue limit of the weld increases by nearly 29% with the welding speed from 10 mm/s to 30 mm/s. The fatigue fracture of the joints can be divided into three typical regions of fatigue crack source zone, expansion zone and instantaneous zone, and the fatigue cracks all originate from the surface of the specimen. With the increase of welding speed, the proportion of instantaneous area decreases and the fatigue performance increases.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 8","pages":"Pages 2335-2340"},"PeriodicalIF":0.7,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30188-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77608752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Section Flattening in Numerical Control Bending Process of TA18 High Strength Tube TA18高强度管材数控弯曲加工中的断面压扁

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-08-01 DOI: 10.1016/S1875-5372(18)30190-5

Huang Tao , Yang Fangfang , Zhan Mei , Guo Junqing , Chen Xuewen , Chen Fuxiao , Song Kexing

引用次数: 5

Effect of the Pulling Velocity of Directional Solidification on Thermal Conductivity of Mg-Ag-Zn Alloys 定向凝固拉速对Mg-Ag-Zn合金导热系数的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-08-01 DOI: 10.1016/S1875-5372(18)30192-9

Ma Yanxiang , Li Qiushu , Wang Xudong

引用次数: 0