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Topic Area: Environment/Climate
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Displaying records 331 to 340 of 444 records.
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331. Nonlinear Dynamics Model for Chip Segmentation in Machining
Topic: Environment/Climate
Published: 11/30/1997
Authors: Timothy J Burns, Matthew A. Davies
Abstract: We have developed a new model for chip formation in machining which includes a mechanism for thermomechanical feedback. This leads to an interpretation of metal cutting as a process which is similar in many ways to an open chemical reactor. As the cu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820012

332. Tool Wear Mechanism in Continuous Cutting of Hardened Tool Steels
Topic: Environment/Climate
Published: 11/4/1997
Authors: Y K Chou, Christopher J. Evans
Abstract: Precision hard turning provides an alternative to grinding in some finishing applications. Rapid tool wear, however, remains an impediment to the process being economically viable. This experimental study investigates microstructural aspects of cubic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820028

333. Certification of Three Mussel Tissue Standard Reference Materials for Methylmercury and Total Mercury Content
Topic: Environment/Climate
Published: 6/1/1997
Authors: M K. Donais, R. Saraswati, Elizabeth A Mackey, R. Demiralp, Barbara J. Porter, M. Vangel, M. Levenson, V. Mandic, S. Azemard, M. Horvat, K. May, Hendrik Emons, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100497

334. Certification of a Frozen Mussel Tissue Standard Reference Material for Trace Organic Constituents
Topic: Environment/Climate
Published: 6/1/1997
Authors: Michele M Schantz, R. Demiralp, Robert Russ Greenberg, M. J. Hays, Reenie May Parris, Barbara J. Porter, Dianne L Poster, Lane C Sander, Katherine E Sharpless, Stephen A Wise, S. B. Schiller
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100545

335. Factors Influencing Polycyclic Aromatic Hydrocarbon Concentrations and Patterns in South Carolina Sediments
Topic: Environment/Climate
Published: 6/1/1997
Authors: John R Kucklick, S Sivertsen, M Sanders, Gregory Scott
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100511

336. Characterization of Three PCB Technical Mixtures Using a Novel Cyanobiphenyl Stationary Phase and Mass Selective Detection
Topic: Environment/Climate
Published: 3/1/1997
Authors: B. R. Hillery, J. E. Girard, Michele M Schantz, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100507

337. Certification of Polycyclic Aromatic Hydrocarbons in Mussel Tissue Standard Reference Materials (SRMs)
Topic: Environment/Climate
Published: 2/1/1997
Authors: Stephen A Wise, Michele M Schantz, M. J. Hays, B. J. Koster, Katherine E Sharpless, Lane C Sander, S. B. Schiller
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100563

338. Finish Hard Turning of Powder Metallurgy M50 Steel
Topic: Environment/Climate
Published: 1/1/1997
Authors: Y K Chou, Christopher J. Evans
Abstract: Finishing performance in turning of hardened powder metallurgy (PM) AISI M50 steel using cubic boron nitride (CBN) tools has been studied. Tool wear and flank wear rates are unusually small and are relatively insensitive to cutting conditions. This i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820027

339. The Dynamics of Chip Segmentation in Machining
Topic: Environment/Climate
Published: 1/1/1997
Authors: Matthew A. Davies, Christopher J. Evans, Timothy J Burns
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820109

340. The dynamics of chip formation in machining
Topic: Environment/Climate
Published: 1/1/1997
Authors: Matthew A. Davies, Christopher J. Evans, Timothy J Burns
Abstract: In this paper, we provide experimental, numerical and analytical evidence suggesting that the onset of segmented chip formation is the result of a Hopf bifurcation in the material flow. We modify the conventional one-dimensional model for orthogonal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820013



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