2010
DOI: 10.4028/www.scientific.net/msf.638-642.465
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Effect of Cr and Zr Dopes on Hydrogen Behaviour in Rapidly Solidified Aluminium Foils

Abstract: Hydrogen (H) behaviour in materials was investigated in rapidly solidified (RS) foils of pure aluminium (Al), Al-0.4 Cr and Al-0.25 Zr alloys (at %) by means of thermal desorption spectroscopy (TDS). In addition, Al-0.25; 0.3 Zr alloys were examined with respect to microstructure and its instability during the thermal process using SEM and microhardness measurements. The effect of dopes and heating rate on H desorption was summarized. The lowest energy desorption is attributed with significant thermal desorpti… Show more

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Cited by 9 publications
(4 citation statements)
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“…The fact that peak 1a appears to become more distinct with increase in Cr concentration can be inferred to be related to increase of H amount associated with dislocations and is in line with our previous experiments [9]. In addition, it is assumed that followed peak 2a can be associated with release of hydrogen trapped by Al 7 Cr precipitates at a temperature coinciding with coalescence of secondary phase precipitates in RS Al-Cr alloys [15]. Note that peak 2a has not appeared over the explored temperature range in previous TDS spectra from Al-Cr alloys probably because it occurs close to the melting point in case of thermal desorption testing at high heating rates.…”
Section: Resultssupporting
confidence: 88%
“…The fact that peak 1a appears to become more distinct with increase in Cr concentration can be inferred to be related to increase of H amount associated with dislocations and is in line with our previous experiments [9]. In addition, it is assumed that followed peak 2a can be associated with release of hydrogen trapped by Al 7 Cr precipitates at a temperature coinciding with coalescence of secondary phase precipitates in RS Al-Cr alloys [15]. Note that peak 2a has not appeared over the explored temperature range in previous TDS spectra from Al-Cr alloys probably because it occurs close to the melting point in case of thermal desorption testing at high heating rates.…”
Section: Resultssupporting
confidence: 88%
“…Therefore it is considered that at least four peaks are identified in the spectra for all Al-Cr alloys, see Table 1. Note that hydrogen thermal desorption curves from RS Al-0.4 Cr alloy 16) exhibit peak temperatures identical with those stated above. A new small peak detected at 340 C only in the TDS profile from Al-3.0 Cr alloy is not denoted in Table 1.…”
Section: Resultssupporting
confidence: 61%
“…However, the noticeable peak at 480 C reported for RS Al-0.4 Cr alloy 16) supports identification of peak 3 as a pore trap state. This fact is evident because of absent of the secondary phase precipitates in RS Al-0.4 Cr alloy foils.…”
Section: Resultsmentioning
confidence: 82%
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