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An experimental study has been performed to investigate the capabilities of dry, conventional and high pressure jet assisted turning of two different hard-to-machine materials, namely hard-chromed and surface hardened Ck45 and Inconel 718. The capabilities of different hard turning procedures are compared by means of chip breakability, technological windows, cooling lubrication efficiency, and ...

A general method for brazing ceramics to metals using a compliant metallic foam as a buffer layer has been developed. Using stainless steel foams, bonds between alumina and 316 stainless steel with shear strengths up to 33 MPa have been achieved. The resultant ductility enhances the resistance of the joint to thermal cycling; AlN-Inconel 600 bonds exhibited good thermal shock resistance. Alumin...

Inconel 718 is a Ni-Cr-Fe superalloy which presents excellent mechanical properties at high temperatures, as well as good corrosion resistance and weldability. These characteristics can be optimized with an appropriate control of microstructural features such as grain size and precipitation. Precipitates of different nature can form in these alloys, i.e. γ’’ (a metastable metallic compound Ni3N...

In turning process, engineers are often faced with the problems of relating the cutting parameters (Speed, feed, depth of cut) to the output responses(Feed force, Thrust force, Cutting force, Surface roughness) to optimize the process. Also, Turing is done with the aim of achieving the best surface finish. But without optimization, it is not possible to automate the process. Turning process inv...

The application of emulsion for combined heat extraction and lubrication requires continuous monitoring of the quality of emulsion to sustain a desired grinding environment; this is applicable to other grinding fluids as well. Thus to sustain a controlled grinding environment, it is necessary to adopt an effectively lubricated wheel-work interface. The current study was undertaken to assess exp...

Janine M Preble1,2 & Charles Stephen Foster*,1,2,3 Massachusetts Eye Research & Surgery Institution, 5 Cambridge Center, 8th Floor, Cambridge, MA 02142, USA Ocular Immunology & Uveitis Foundation, 5 Cambridge Center, 8th Floor, Cambridge, MA 02142, USA Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA *Author for correspondence: Tel.: +1 617 621 6377 Fax: +1 617 494 1430 sfoster...