منابع مشابه
Serena Chan
G. Pascal Zachary is a senior writer for The Wall Street Journal. He is also a contributing editor of the newsmagazine In These Times and a columnist for Technology Review. His first technology-related book Showstopper (1994) focused on innovation at Microsoft. His second book, Endless Frontier: Vannevar Bush, Engineer of the American Century, follows the life and career of a highly controversi...
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This paper describes damping capac i t y and mechanical p roper t ies o f Zn-8-20%A1 and Zn-8-20%Al-0.02-0.04XMg a l l o y cast ings. Zn-8-20%A1 a l l o y casti ngs show h igh damping when quenched from 573K. Small amount o f Mg a d d i t i o n t o these a l l o y cast ings lowers damping capaci ty considerably b u t e f f e c t i v e t o reduce decomposition through aging a t 423K f o r 48hrs ...
متن کاملOn the Damping Behaviour of Niti Shape Memory Alloy
Shape memory alloys exhibit a high damping capacity in the mktensite state. Results obtained from both DMA and cyclic tests under tension-compression load show that the martensite damping capacity in NiTi SMAs is a function of both strain amplitude and annealing temperature. Internal friction due to movements of martensite twin boundaries within both elastic (accommodation) and inelastic (reori...
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Inflaton field governed universe from NKK theory of gravity: stochastic approach. Abstract We study a nonperturbative single field (inflaton) governed cosmological model from a 5D Noncompact Kaluza-Klein (NKK) theory of gravity. The inflaton field fluctuations are estimated for different epochs of the evolution of the universe. We conclude that the inflaton field has been sliding down its (quad...
متن کاملEBSD Characterization of the Twinning Microstructure in a High-Damping Mn--Cu Alloy
The {101} transformation twinning bands in Mn–Cu alloys are considered to be the dominant microstructural feature contributing to the high damping capacity of the alloys. Because the face-centered-tetragonal (fct) phase of Mn–Cu alloys has an axis ratio ðc=aÞ of nearly 1, an angular resolution for Kikuchi diffraction bands of better than 0.5 is necessary to identify the twin boundaries by the e...
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ژورنال
عنوان ژورنال: Bulletin of the Japan Institute of Metals
سال: 1992
ISSN: 0021-4426,1884-5835
DOI: 10.2320/materia1962.31.562