Ceramic micro parts. Part 1: How thermal debinding can be utilized to enhance surface finish and mechanical properties

2013 ◽  
Vol 33 (15-16) ◽  
pp. 3123-3134 ◽  
Author(s):  
Fatih A. Çetinel ◽  
Werner Bauer
Keyword(s):  
Mechanical Properties ◽  
Surface Finish ◽  
Micro Parts ◽  
Thermal Debinding

scholarly journals Extrusion Based 3D Printing of Sustainable Biocomposites from Biocarbon and Poly(trimethylene terephthalate)

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4164
Author(s):  
Elizabeth Diederichs ◽  
Maisyn Picard ◽  
Boon Peng Chang ◽  
Manjusri Misra ◽  
Amar Mohanty
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Surface Finish ◽  
Three Dimensional ◽  
Morphological Properties ◽  
Great Promise ◽  
Structural Components ◽  
Computer Aided ◽  
Trimethylene Terephthalate ◽  
Optimal Quantity

Three-dimensional (3D) printing manufactures intricate computer aided designs without time and resource spent for mold creation. The rapid growth of this industry has led to its extensive use in the automotive, biomedical, and electrical industries. In this work, biobased poly(trimethylene terephthalate) (PTT) blends were combined with pyrolyzed biomass to create sustainable and novel printing materials. The Miscanthus biocarbon (BC), generated from pyrolysis at 650 °C, was combined with an optimized PTT blend at 5 and 10 wt % to generate filaments for extrusion 3D printing. Samples were printed and analyzed according to their thermal, mechanical, and morphological properties. Although there were no significant differences seen in the mechanical properties between the two BC composites, the optimal quantity of BC was 5 wt % based upon dimensional stability, ease of printing, and surface finish. These printable materials show great promise for implementation into customizable, non-structural components in the electrical and automotive industries.

Lower Body Orthotic Calipers With Composite Braces

2018 ◽  
pp. 133-151
Author(s):  
Nisha Kumari ◽  
Kaushik Kumar
Keyword(s):  
Mechanical Properties ◽  
Surface Finish ◽  
Volume Ratio ◽  
Solid Modeling ◽  
Experimental Results ◽  
Lower Body ◽  
Corrosion Resistant ◽  
Lower Weight ◽  
Modeling Software ◽  
Strength And Stiffness

Composite based materials are finding application in a large number of research and engineering spectrum due to its better mechanical properties (strength and stiffness), inherent surface finish, easiness in fabrication and installation and corrosion resistant. They are very strong and firm, yet very light in weight due to which lower weight-to-volume ratio can be achieved and stiffness to weight is 1.5 times greater than the non-ferrous materials like Aluminum. The work is undertaken in two parts. First and foremost being modeling and virtual estimation of mechanical properties using CREO and ANSYS for currently used aluminum based calipers and fabrication of the composites and testing of the same. A comparison is performed between the virtual and experimental results and also the effectiveness of composite based calipers over Aluminum ones is studied. Here two polymeric based composites are proposed for fabrication which are thermoplast and thermoset based composites respectively. The braces are modeled using a solid modeling Software, CREO and the same is tested using ANSYS.

Process and Material Property Effects in the Progressive Forming of Micro-Pins

2010 ◽  
Vol 447-448 ◽  
pp. 432-436
Author(s):  
Samuel C.V. Lim ◽  
Yingyot Aue-U-Lan ◽  
Danno Atsushi ◽  
Mei Qian Chew ◽  
Chow Cher Wong
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Mechanical Property ◽  
Material Property ◽  
Significant Role ◽  
Forming Process ◽  
Forming Load ◽  
Micro Parts ◽  
Progressive Forming ◽  
Microstructure Of The Material

A progressive forming process for micro-components was developed to circumvent the issue of handling of small micro-parts while keeping in mind the need for high manufacturing through-put. The mechanical properties and microstructure of the material have been found to play a significant role in the forming of micro-components. In this work, the effect of mechanical property on the forming of copper micro-pins by the progressive forming process is highlighted. Empirical results show that the forming load decreases for forming micro-pin with 0.3mm diameter after annealing but the pin height obtainable decreases as well compared to that prior to the heat treatment.

Effects of Specimen Diameter on Microstructure and Microhardness of Hot Extruded AZ31B Magnesium Alloy

2014 ◽  
Vol 1004-1005 ◽  
pp. 158-162 ◽  
Author(s):  
Xiang Ting Hong ◽  
Fu Chen ◽  
Fei Chen ◽  
Wang Yu ◽  
Bo Rong Sang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Magnesium Alloy ◽  
Size Effects ◽  
Strain Distribution ◽  
Elevated Temperatures ◽  
Az31b Magnesium Alloy ◽  
Specimen Diameter ◽  
Average Grain Size ◽  
Micro Parts

Microstructures of metal micro parts after microforming at elevated temperatures must be evaluated due to mechanical properties depend on average grain size. In this work, the effects of specimen diameter on the microstructure and microhardness of a hot-extruded AZ31B magnesium alloy were studied. Obvious size effect on microstructure and microhardness of the alloy could be observed. The size effects could be explained by strain distribution and dislocation density differences between the two kinds of specimens.

scholarly journals Effect of Carbon Fiber Orientation and Helix Angle on CFRP Cutting Characteristics by End-Milling

2013 ◽  
Vol 7 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Masahiro Hagino ◽  
◽  
Takashi Inoue ◽  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Surface Finish ◽  
Fiber Orientation ◽  
End Milling ◽  
Cutting Speed ◽  
Helix Angle ◽  
Depth Of Cut ◽  
Reinforced Plastics ◽  
End Mills

Carbon Fiber Reinforced Plastics (CFRP) have outstanding lightweight material characteristics and tensile strength. The use of CFRP in aerospace industry has been successfully implemented and is expected to grow in the future. However, the mechanical properties of CFRP are affected by differences in the distribution and orientation of the carbon fibers and their adhesion to the binding material. CFRP shows intense anisotropy in strength of carbon fiber depending on its mechanical properties and the state of the carbon fiber orientation. Therefore, the tool life shortest and the surface finish quality of the material becomes unstable and eventually difficult to cut. This paper presents the effect on carbon fiber orientation and helix angle with CFRP cutting characteristics by end milling. Here, three types of orientations weremachined by straight type end mills and constant cutting conditions with a cutting speed 70 m/min, a feed rate 0.056 mm/tooth and 3 mm depth of cut. Our results showed that the tool helix angle 0° gave a better surface finish than the other tools, irrespective of the fiber orientation. The helix angle is greatly affected by the exposure of the fibers from the surface. Axial force (Fz) is negligible quantity for helix angle 0°, and cutting force is low. The carbon fiber orientation of 45° and -45° has exfoliation-like dimples.

Surface finish and mechanical properties of commercial aluminas

1997 ◽  
Vol 17 (2-3) ◽  
pp. 479-486 ◽  
Author(s):  
L. Esposito ◽  
A. Tucci ◽  
G. Andalò
Keyword(s):  
Mechanical Properties ◽  
Surface Finish

Investigation of Microstructure and Hardness in Microfoming of Pure Copper Pins

2010 ◽  
Vol 447-448 ◽  
pp. 381-385
Author(s):  
Ehsan Ghassemali ◽  
Anders W.E. Jarfors ◽  
Ming Jen Tan ◽  
Samuel C.V. Lim ◽  
Mei Qian Chew
Keyword(s):  
Mechanical Properties ◽  
Material Flow ◽  
Strain Distribution ◽  
Pure Copper ◽  
Extrusion Process ◽  
Optical Microscope ◽  
Gradient Distribution ◽  
Micro Scale ◽  
Part Geometry ◽  
Micro Parts

Microforming is defined as the process of production of metallic micro-parts with sub-millimeter dimension. There is as strong interaction between the scale of the microstructure and the size of the part affecting material flow, the so-called “size effect” in microforming processes. Conventional forming rules cannot be directly applied to the micro-scale forming. To better understand the implications for part geometry and properties, further investigation of the material flow related events is necessary. The aim of this work is to investigate microstructural evolution of pure copper during a micro-extrusion process - for production of micro-pins with diameters varying from 300 to 800µm - by means of optical microscope (OM). Qualitative strain gradient distribution could be observed by those pictures. The results showed that change of micro-pins diameter and die angle affect the microstructure and strain distribution of the final product remarkably, that affect the mechanical properties of the pin formed. Furthermore, microhardness results were consistent with the microstructural observations.

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