نتایج جستجو برای: lead metallurgy

تعداد نتایج: 342471  

Journal: :Physical review letters 2014
D Kobyakov C J Pethick

In the standard picture of the crust of a neutron star, matter there is simple: a body-centered-cubic lattice of nuclei immersed in an essentially uniform electron gas. We show that, at densities above that for neutron drip (∼ 4 × 1 0(11)  g cm(-3) or roughly one-thousandth of nuclear matter density), the interstitial neutrons give rise to an attractive interaction between nuclei that renders t...

2004
Scott M Oppenheimer John G. O'Dwyer David C. Dunand

Near-stoichiometric NiTi was foamed in the solid state at elevated temperatures through creep expansion of highpressure argon pores previously entrapped during powder consolidation. A sample with 17% porosity was found to be superelastic up to a compressive stress of 800 MPa.

2007
Roger Reed

When significant resistance to loading under static, fatigue and creep conditions is required, the superalloys have emerged as the materials of choice for high temperature applications. This is particularly true when operating temperatures are beyond about 800C. This is the case for gas turbines used for (i) jet propulsion, e.g. the 100,000 lb thrust engines used for powering large two-engined ...

2015
R. S. Qin A. Bhowmik

A priori derivation for the extra free energy caused by the passing electric current in metal is presented. The analytical expression and its discrete format in support of the numerical calculation of thermodynamics in electric current metallurgy have been developed. This enables the calculation of electric current distribution, current-induced temperature distribution and free energy sequence ...

Journal: :Stankoinstrument 2018

Journal: :JOURNAL OF THE JAPAN WELDING SOCIETY 2009

Journal: :Journal of the American Chemical Society 1904

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