scholarly journals Influences of bioapatite mineral and fibril structure on the mechanical properties of chicken bone during the laying period

2019 ◽  
Vol 98 (12) ◽  
pp. 6393-6399
Author(s):  
Shujie Wang ◽  
Yunxiao Hu ◽  
Yiling Wu ◽  
Yawen Liu ◽  
Guoqing Liu ◽  
...  
2017 ◽  
Vol 64 ◽  
pp. 81-93 ◽  
Author(s):  
Kelsey A. Robinson ◽  
Mei Sun ◽  
Carrie E. Barnum ◽  
Stephanie N. Weiss ◽  
Julianne Huegel ◽  
...  

Holzforschung ◽  
2000 ◽  
Vol 54 (6) ◽  
pp. 654-660 ◽  
Author(s):  
A. Bergander ◽  
L. Salmén

Summary The transverse mechanical properties of the wood fibre play important roles in the use of wood and its fibres in various applications. However, the variation in properties of fibres from different parts of the tree and the relation of these properties to the structure of the fibre is not yet established. This study focuses on the variation in the transverse elastic modulus of the fibre wall and its relation to the fibril structure of the S2- and S1-layer. For this reason the local fibril angle of radial and tangential fibre walls were measured by polarisation confocal microscopy. It was shown that the variation in fibril angle of the S2-layer seems to have very little influence on the transverse modulus of the fibres. Instead the thickness and fibril angle of the S1- and thus also the S3-layer should contribute to the variation in transverse modulus between earlywood and transition wood fibres. The importance of the ray cells for the transverse elastic properties of the wood was also emphasised.


Author(s):  
NITHYANANDHAN T ◽  
◽  
RAMAMOORTHI R ◽  

To deal with demands in advanced engineering applications that focus on improved mechanical properties of metal composites, aluminium metal matrix composites are recommended. This paper deals with mechanical characteristics of aluminium (Al8011) fortified with silicon carbide (SiC) and Chicken Bone Ash (CBA).Varying percentages of silicon carbide starting from 0%, 2%, 4%, 6%, 8% and 10% with percentages of chicken bone ash starting from 10%, 8%, 6%, 4%, 2% and 0% respectively for the purpose of testing and reinforcement. Stir casting method is employed to manufacture the components. In this paper, fatigue test, impact test and hardness test is carried out to obtain results about the mechanical characteristics of the components. The mechanical characteristics observed in the resultant composites as per ASTM standards and microstructural study is used to characterize the distribution of reinforcements. Ultimately as the weight percentage of reinforcement materials increases, elevation in mechanical characteristics of material is discerned.


2000 ◽  
Vol 79 (9) ◽  
pp. 1345-1350 ◽  
Author(s):  
H. Kocamis ◽  
Y.N. Yeni ◽  
C.U. Brown ◽  
P.B. Kenney ◽  
D.C. Kirkpatrick-Keller ◽  
...  

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Kheng Lim Goh ◽  
David F. Holmes ◽  
Yin Hui Lu ◽  
Karl E. Kadler ◽  
Peter P. Purslow

Author(s):  
S. Fujishiro

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.


Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).


Author(s):  
D. R. Clarke ◽  
G. Thomas

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.


Author(s):  
Li Li-Sheng ◽  
L.F. Allard ◽  
W.C. Bigelow

The aromatic polyamides form a class of fibers having mechanical properties which are much better than those of aliphatic polyamides. Currently, the accepted morphology of these fibers as proposed by M.G. Dobb, et al. is a radial arrangement of pleated sheets, with the plane of the pleats parallel to the axis of the fiber. We have recently obtained evidence which supports a different morphology of this type of fiber, using ultramicrotomy and ion-thinning techniques to prepare specimens for transmission and scanning electron microscopy.


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