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Topic Area: Environment/Climate
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Displaying records 321 to 330 of 447 records.
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321. Dynamic Problems in Hard Turning, Milling and Grinding
Topic: Environment/Climate
Published: 1/1/1998
Author: Matthew A. Davies
Abstract: In this chapter we examine the application of nonlinear dynamics to various problems in manufacturing. We focus on three practical machining processes currently receiving significant industrial attention: turning of hardened steels (hard-turning), hi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820033

322. Frequency Domain Modal Estimation Techniques, Experimental Techniques
Topic: Environment/Climate
Published: 1/1/1998
Authors: S Fahey, Jon Robert Pratt
Abstract: In this brief, we discuss the estimation of modal parame-ters using single-degree-of-freedom approximations. Then, we proceed to review two multi-degree-of- freedom techniques for modal parameter estimations-the first based on dynamic matrices and th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820115

323. On the dynamics of high-speed milling with long slender endmills
Topic: Environment/Climate
Published: 1/1/1998
Authors: Matthew A. Davies, A Schaut, Jon Robert Pratt, Brian S. Dutterer
Abstract: Tool deflections of high length-to-diameter ratio endmills are measured with capacitance probes during high-speed milling and compared with the predictions of regenerative chatter theory. Poincar? sectioning (once per revolution sampling) techniques ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820067

324. Process Effects on White Layer Formation in Hard Turning
Topic: Environment/Climate
Published: 1/1/1998
Authors: Y K Chou, Christopher J. Evans
Abstract: This paper discusses surface microstructural alterations in hard turned steels. A metallurgically unetchable structure, called white layer?, followed by a dark etching layer has been found on AISI 52100 steel surfaces machined in a hardened state (60 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820029

325. Time Domain Modal Estimation
Topic: Environment/Climate
Published: 1/1/1998
Authors: S Fahey, Jon Robert Pratt
Abstract: In a previous technical feature,2 we described some motives for performing structural dynamic tests and subsequently reviewed some frequency domain techniques for uncovering modal parameters. This time, we take up some applicable time domain algorith ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820116

326. Ultrasonic Detection of Unstable Plastic Flow in Hard Metal Cutting
Topic: Environment/Climate
Published: 1/1/1998
Authors: Matthew A. Davies, Gerald V. Blessing, Christopher J. Evans, Steven Earl Fick
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820062

327. White layers and thermal modeling of hard turned surfaces
Topic: Environment/Climate
Published: 1/1/1998
Authors: Y K Chou, Christopher J. Evans
Abstract: White layers in hard turned surfaces are identified, characterized and measured as a function of tool flank wear and cutting speed. White layer depth progressively increases with flank wear. It also increases with speed, but approaches an asymptote. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820094

328. High-Speed Machining
Topic: Environment/Climate
Published: 12/20/1997
Authors: Matthew A. Davies, S J Smith
Abstract: Increasing the power and speed of machining operations has several advantages. These include: [1] shorter machining time; [2] improved surface finish; [3] reduced thermal and mechanical stresses on the workpiece and tool, and [4] increased dynamic st ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820014

329. Establishing Baseline Levels of Elements in Marine Mammals Through Analysis of Banked Liver Tissues
Topic: Environment/Climate
Published: 12/1/1997
Authors: Paul R Becker, Elizabeth A Mackey, R. Demiralp, B. J. Koster, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100483

330. Fabrication of Plastic Microfluid Channels by Imprinting Methods
Topic: Environment/Climate
Published: 12/1/1997
Authors: Larissa Evgenievna Martynova, Laurie E Locascio, Michael Gaitan, Gary W Kramer, Richard G. Christensen, William Ambrose MacCrehan
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903674



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