Composites Engineering最新文献_第4页

Artificially layered nanocomposites fabricated by jet vapor deposition 射流气相沉积制备层状纳米复合材料

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)00034-K

H.N.G. Wadley, L.M. Hsiung, R.L. Lankey

{"title":"Artificially layered nanocomposites fabricated by jet vapor deposition","authors":"H.N.G. Wadley, L.M. Hsiung, R.L. Lankey","doi":"10.1016/0961-9526(95)00034-K","DOIUrl":"10.1016/0961-9526(95)00034-K","url":null,"abstract":"<div>Novel jet vapor deposition (JVD) processes offer considerable promise for the inexpensive synthesis of functionally graded (composite) materials (FGMs). Here, we explore microstructure-mechanical property relationships for a model Al/Cu metal-metal system and an Al/Al203 metal-metal oxide multilayered nanocomposite system fabricated by the JVD process. The 10μm thick <math><mtext>Al</mtext><mtext>Cu</mtext></math> multilayers were deposited on silicon wafers at a substrate temperature of ∼140°C. The A1 and Cu layers were of approximately equal thickness and were systematically varied from ∼20 to ∼1000 nm. The 20μm thick <math><mtext>rmAl</mtext><mtext>Al</mtext><msub><mi></mi><mn>2</mn></msub><mtext>O</mtext><msub><mi></mi><mn>3</mn></msub></math> multilayers were deposited on glass slides at ∼250°C. The oxide layer thickness was held constant in the ∼2–6 nm range, whilst the Al layer thickness was systematically varied from ∼3 to ∼50 nm. The structure of the Al/Cu multilayers was polycrystalline and had a strong [111] texture, whereas the Al/Al2O3 multilayers consisted of amorphous aluminum oxide layers and polycrystalline metal layers with randomly oriented grains. The yield strength of the Al/Cu multilayers exhibited an inverse dependence upon layer thickness when the layer spacing exceeded ∼50 nm. When the <math><mtext>Al</mtext><mtext>Cu</mtext></math> layer spacing was thinner than ∼50 nm, the strength was better predicted by a Koehler image force model. A similar phenomenon was also found in the Al/Al2O3 multilayers. In this case the critical metal layer thickness for the transition from an Orowan to a Koehler type behavior was approximately 25 nm. This is consistent with theoretical predictions which indicate that the critical layer thickness of the low modulus consistuent decreases as the difference in shear moduli between the two constituent layers increases.</div>","PeriodicalId":100298,"journal":{"name":"Composites Engineering","volume":"5 7","pages":"Pages 935-945, 947-950"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0961-9526(95)00034-K","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88525258","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: 8

Taguchi analysis of heat treatment variables on the mechanical behavior of alumina/aluminum metal matrix composites 热处理变量对氧化铝/铝金属基复合材料力学行为的影响

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)90709-K

G. Leisk, A. Saigal

引用次数: 13

Effects of band weaving on fiber strength in filament-wound composite structures 带织对长丝缠绕复合材料纤维强度的影响

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(94)00103-G

Kurt Gramoll, Srinivasan Ramaprasad

引用次数: 6

Vibrations of multi-span non-symmetric composite beams 多跨非对称组合梁的振动

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(94)00105-I

Haim Abramovich , Moshe Eisenberger , Oleg Shulepov

引用次数: 22

Real-time ultrasonic and acoustic emission monitoring of damage in graphite/epoxy laminates 石墨/环氧层合板损伤的实时超声声发射监测

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)00063-S

Shi-Chang Wooh, Isaac M. Daniel, Heoung-Jae Chun

引用次数: 3

Consistent higher-order analysis on shock response of cross-ply curved panels 交叉铺层弯曲板冲击响应的一致高阶分析

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(94)00098-T

C.C. Chao, T.P. Tung

引用次数: 4

Fracture toughness and low cycle fatigue of 6061/A12O3p composites 6061/A12O3p复合材料的断裂韧性和低周疲劳性能

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)00022-F

N.P. Hung, W. Zhou, E.T. Peh, C.S. Chan

{"title":"Fracture toughness and low cycle fatigue of 6061/A12O3p composites","authors":"N.P. Hung, W. Zhou, E.T. Peh, C.S. Chan","doi":"10.1016/0961-9526(95)00022-F","DOIUrl":"10.1016/0961-9526(95)00022-F","url":null,"abstract":"<div>This paper investigates the low cycle fatigue and fracture behavior of cast-then-hot-extruded 6061 aluminum reinforced with alumina particles. The effect of heat treatment and volume percentages of the particle (0–20%) on the axial fatigue behavior and fracture toughness was investigated. Cyclic hardening of the under-aged and the peak-aged samples was observed while cyclic softening of the over-aged specimens was recorded. Although fatigue data follow the Coffin-Manson's model, the fatigue resistance of the composites was lower than that of the matrix alloy regardless of aging and percentage of the reinforcement. Plane strain condition was marginally achieved due to insufficient sample thickness. The measured fracture toughness for these composites however was low compared with that of the matrix alloy and decreased with increasing reinforcement content. Scanning electron microscopy reveals that a crack starts at a machine defect and propagates through or avoids a particle depending on the relative position of the crack front and the particle. Three failure modes were found for this advanced material: cleavage fracture of a particle, cohesive delamination between matrix and particle and void coalescence in the matrix.</div>","PeriodicalId":100298,"journal":{"name":"Composites Engineering","volume":"5 5","pages":"Pages 509-517"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0961-9526(95)00022-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72709299","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

Weight versus strength: A case study 重量与力量：一个案例研究

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)00047-Q

Genady P. Cherepanov

引用次数: 0

Thermal shock behavior of fiber-reinforced ceramic matrix composites 纤维增强陶瓷基复合材料的热冲击行为

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(95)00051-N

Raj N. Singh, Hongyu Wang

引用次数: 38

Flexural-torsional stability of thin-walled composite I-section beams 薄壁组合梁的弯扭稳定性

Composites Engineering Pub Date : 1995-01-01 Epub Date: 2008-07-14 DOI: 10.1016/0961-9526(94)00101-E

Mahesh D. Pandey, Mohammad Z. Kabir, Archibald N. Sherbourne

引用次数: 62