3D Printing
One of the most advanced printing technologies involves 3D printing. There are several types of 3D printers, including nano printers for printing on the nano scale. There are 3D printers that print various types of materials. You will find printers that use plastic, powder, and paper even cholate and sugar. The possibilities are endless when you think about the types of materials you can use for 3D printing. 3D printers are available in all shapes and sizes. Some take up an entire room, and some can be easily placed on your desktop.
(Singh S., Begining Google Sketchup for 3D Printing, 2010, p.XVI)
Microvoid Coalescence
Transgranular microvoid coalescence is the typical process by which slow stable tearing and unstable ductile fracture occur. The microvoids nucleate at various discontinuties. For steels and aliminium alloys the most important nucleation sites are large particles and dispersoids. In titanium alloys the voids nucleate at boundaries between alfa and beta phases.
(Janssen J., Zudema J., Wanhill R. J. H., Fracture Mechanics, , p.329-330 )
Push fit
A push fit is a transition fit. It is lso known as “sung fit” and represents the closet fit that permits assembling parts by hand. With a push fit, there should be no receptile play between the mating parts.
(Rajput R. K., Comprehensive Workshop Practise, p.208)
No comments:
Post a Comment