منابع مشابه
Solubility of hydrogen in metals
Products of interactions of transition metals with hydrogen exhibit retentions of essential metallic properties accompanied by decreases of density. With reference to temperature and to hydrogen gas-pressures, p, in equilibrium, different metals exhibit very different levels of hydrogen content, c. For elements in subgroups 111, IV and V and palladium in group VIII, initial regions of solid sol...
متن کاملPositive effects of hydrogen in metals
Hydrogen is often present in metals as a result of production, fabrication and processing operations or service conditions. Thus, it can be regarded as an alloying element. Although, high hydrogen levels in metals can have a devastating effect on the mechanical properties, many positive effects can also be derived from its high solubility. The objective of this paper is to review some positive ...
متن کاملThe challenges of hydrogen and metals.
The Royal Society Scientific Discussion Meeting 'The challenges of hydrogen and metals' was held in Carlton House Terrace, London, UK, on 16-18 January 2017. This is the introductory article to the discussion meeting issue which includes contributed papers and seven discussion papers. Here, we introduce the motivation to hold the Meeting and give a brief overview of the contents. We conclude wi...
متن کاملPre-existing brain states predict risky choices
Rational decision-making models assume that people resolve an economic problem based on its properties and the underlying utility. Here we challenge this view by examining whether pre-stimulus endogenous neuronal fluctuations can bias economic decisions. We recorded subjects' pre-stimulus neural activation patterns with fMRI before presentation and choice between pairs of certain outcomes and r...
متن کاملan investigation on the role of hydrogen in metals
recently, grave explosions in the oil and gas transport tubes, as well as, the rapid failure of the machine parts in service, were caused by hydrogen cracking. during solidification of metals, in casting ,welding, cathodic charging, etc., the hydrogen can enter in metals and cause premature cracking. the hydrogen embrittlement in metals is accompanied with a charge in the type of fracture surfa...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
سال: 2004
ISSN: 0387-5008,1884-8338
DOI: 10.1299/kikaia.70.1027