Showing 180 results for Author: Jun Qu
Mar, 2008
Journal
A new analytical model for thermal drilling (also known as friction drilling) has been developed. The model distinguishes itself from recent work of other investigators by improving on two aspects: (1) the new model defines material plastic flow in terms of the yield in shear rather than the yield in compression, and (2) it uses a single, variable friction coefficient inst…
Sep, 2007
Journal
A reciprocating wear test method has been developed to evaluate the resistance of metal foils to scrubbing abrasion. Development included the definition of a quantitative measure of the scrubbing resistance. In order to test the ability of the new method to differentiate between surface treatments, four versions of Type 316 stainless steel foils were tested: annealed (A-NT…
Aug, 2007
Conference Paper
A promising, alternative surface treatment to traditional case carburizing was recently developed. It enables extremely high ('colossal') super-saturation of carbon (up to 12 at%) in austenitic stainless steel surfaces. This new treatment offers the advantage of hardening the surface while still retaining the corrosion resistance of stainless steels. In this study, the tri…
Dec, 2006
Conference Paper
Dec, 2006
Conference Paper
Oct, 2006
Journal
Friction and wear are estimated to cost 6% of the US gross national product, or around $700 billion annually. A new class of more effective lubricants could lead to huge energy savings. Limited recent literature has suggested potential for using room-temperature ionic liquids as lubricants, however only a few out of millions (or more) of species have been evaluated. Recent…