2008
DOI: 10.1063/1.2956666
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Shear band melting and serrated flow in metallic glasses

Abstract: Scanning electron microscopy observations of shear steps on Zr-based bulk metallic glasses show direct evidence of shear band melting due to heat generated by elastic energy release. The estimated range of attained temperatures and the observed morphologies are consistent with shear steps forming at a subsonic speed limited by a required redistribution of local microscopic stresses. The calculations indicate that a 0.2μm layer melts in the vicinity of a shear band forming a 1μm shear step. The plastic part of … Show more

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Cited by 115 publications
(63 citation statements)
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“…Indeed, any deformation induced heating effects can be neglected. According to recent calculations the thermal energy release, and thus a rise in the sample temperature, depends on the deformation rate and shear offset, in addition to the thermal conductivity and the strength of the glassy phase [127][128][129]. However, the deformation areas observed in the ribbon sample tested in situ are much wider compared to the highly localized deformation bands observed in bulk glassy sample.…”
Section: In Situ Room-temperature Tensile Deformation In Temmentioning
confidence: 87%
“…Indeed, any deformation induced heating effects can be neglected. According to recent calculations the thermal energy release, and thus a rise in the sample temperature, depends on the deformation rate and shear offset, in addition to the thermal conductivity and the strength of the glassy phase [127][128][129]. However, the deformation areas observed in the ribbon sample tested in situ are much wider compared to the highly localized deformation bands observed in bulk glassy sample.…”
Section: In Situ Room-temperature Tensile Deformation In Temmentioning
confidence: 87%
“…Использованная в настоящей работе барическая обработка продолжалась в течение нескольких часов (около 2 h подъем давления, 30−60 min выдержка и около 2 h стравливание давления), поэтому при такой обработке имеется значительно больше вре-мени для образования нанокристаллов. Если учитывать обсуждаемый в ряде работ [28][29][30] разогрев материала в полосе сдвига, то длительность процесса деформирова-ния оказывается важным параметром и может влиять на количество нанокристаллов, образующихся по диффузи-онному механизму.…”
Section: ге абросимова ас аронинunclassified
“…Согласно тепловым расчетам энерговыделение в полосе сдвига и, соответственно, рост темпера-туры образца зависят от скорости деформации и величины сдвига (δ) в дополнение к теплопро-водности стекловидной фазы [68][69][70][71].…”
Section: рис 2 схематическое изображение полос сдвигаunclassified