"Materials Science" . "[FD6A8A308697]" . . "2"^^ . "RIV/00216305:26210/05:PU55616" . . "Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron" . "Kohout, Jan" . "Tensile tests and fracture thoughness tests of an unalloyed austempered ductile cast iron (ADI) with the matrix created by upper bainite and containing 30 to 35% of retained austenite were performed in a temperature range - 196C to + 200C to study its mechanical behaviour. The temperature depnedence of true fracture stress, elongation to fracture, and reduction of area is separated into three regions with different fracture behaviour. Unmonotonous temperature depnedence of yeld points defined by plasticc strain of 0.05 to 2% is evidence of the stress induced phase transformation of retained austenite into martensite before these values of plastic strain are reached. The transformation of retained austenite is also substantiated with an increase of hardness and in several cases the decrease of retained austenite content was directly determined with X-ray quantitative phase analysis. Also higher values of dynamic than of static fracture thoughness are evidence of unusual behviour of ADI due to retained"@en . "2"^^ . "Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron" . "6"^^ . . "1392-1320" . "Zvl\u00E1\u0161tnosti deformace a lomov\u00E9ho chov\u00E1n\u00ED izotermicky zu\u0161lecht\u011Bn\u00E9 litiny s kuli\u010Dkov\u00FDm grafitem"@cs . "Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron"@en . . "11" . "4" . "P(GA106/03/1265), Z(MO0FVT0000404)" . . . . . "Fracture thoughness, Austempered Ductile Iron, retained austenite, yeld stress, tensile tests"@en . "Zvl\u00E1\u0161tnosti deformace a lomov\u00E9ho chov\u00E1n\u00ED izotermicky zu\u0161lecht\u011Bn\u00E9 litiny s kuli\u010Dkov\u00FDm grafitem"@cs . . "LT - Litevsk\u00E1 republika" . . "Mechanick\u00E9 vlastnosti Izotermicky zu\u0161lecht\u011Bn\u00E9 litiny s kuli\u010Dkov\u00FDm grafitem , tzv. ADI (Austempered Ductile Iron), jej\u00ED\u017E matrice obsahovala bainitick\u00FD ferit a 30 - 35% stabilizvan\u00E9ho austenitu, byly testov\u00E1ny pomoc\u00ED statick\u00E9 zkou\u0161ky v tahu a zkou\u0161ky lomov\u00E9 hou\u017Eevnatosti v rozmez\u00ED teplot - 196C a\u017E 200C. Teplotn\u00ED z\u00E1vislost skute\u010Dn\u00E9ho lomov\u00E9ho nap\u011Bt\u00ED, ta\u017Enosti a kontrakce je rozd\u011Blena do t\u0159ech oblast\u00ED s rozd\u00EDln\u00FDm lomov\u00FDm chov\u00E1n\u00EDm. Teplotn\u00ED z\u00E1vislost meze kluzu definovan\u00E9 plastickou deformac\u00ED od 0,02 do 22 % je nepravideln\u00E1 a je z zde z\u0159ejm\u00E1 transformace stabilizovan\u00E9ho austnenitu na deforma\u010Dn\u011B indukovan\u00FD martezit b\u011Bhem zat\u011B\u017Eov\u00E1n\u00ED p\u0159i nap\u011Bt\u00EDch ni\u017E\u0161\u00EDch ne\u017E je mez kluzu. V d\u016Fsledku transformace stabilizovan\u00E9ho austenitu na deforma\u010Dne indukovan\u00FD martenzitse zvy\u0161uje tvrdost materi\u00E1lu. V n\u011Bkolika p\u0159\u00EDpadech byl tak\u00E9 pomoc\u00ED mikrorentgenografick\u00E9 f\u00E1zov\u00E9 anal\u00FDzy zji\u0161t\u011Bn \u00FAbytek pod\u00EDlu stabilizovan\u00E9ho austenitu po zat\u00ED\u017Een\u00ED. V p\u0159\u00EDpad\u011B vy\u0161\u0161\u00EDho pod\u00EDlu stabilizovan\u00E9ho austenitu ve struktu\u0159e ADI bylo tak\u00E9 zji\u0161t\u011Bno zv"@cs . "RIV/00216305:26210/05:PU55616!RIV06-GA0-26210___" . "Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron"@en . "Tensile tests and fracture thoughness tests of an unalloyed austempered ductile cast iron (ADI) with the matrix created by upper bainite and containing 30 to 35% of retained austenite were performed in a temperature range - 196C to + 200C to study its mechanical behaviour. The temperature depnedence of true fracture stress, elongation to fracture, and reduction of area is separated into three regions with different fracture behaviour. Unmonotonous temperature depnedence of yeld points defined by plasticc strain of 0.05 to 2% is evidence of the stress induced phase transformation of retained austenite into martensite before these values of plastic strain are reached. The transformation of retained austenite is also substantiated with an increase of hardness and in several cases the decrease of retained austenite content was directly determined with X-ray quantitative phase analysis. Also higher values of dynamic than of static fracture thoughness are evidence of unusual behviour of ADI due to retained" . "V\u011Bchet, Stanislav" . . . . . "338-343" . "26210" . . . . . . "543522" . .