"Praha" . "Mu\u0161\u00E1lek, Radek" . "Mechanick\u00E9 vlastnosti vysokopevnostn\u00EDch ocelov\u00FDch plech\u016F"@cs . "Praha" . . . "2"^^ . "Mechanick\u00E9 vlastnosti vysokopevnostn\u00EDch ocelov\u00FDch plech\u016F"@cs . "Proceedings of Workshop 2007" . "Mechanical Properties of High Strength Steel Sheets"@en . "Bensch, Jan" . "Mechanical Properties of High Strength Steel Sheets"@en . . "Hau\u0161ild, Petr" . . . . "978-80-01-03667-9" . "\u010Cl\u00E1nek shrnuje v\u00FDsledky v\u00FDzkumu proveden\u00E9ho na vysokopevnostn\u00EDch ocelov\u00FDch ple\u0161\u00EDch (HSS) pou\u017E\u00EDvan\u00FDch v automobilov\u00E9m pr\u016Fmyslu. Vhodn\u00E1 metodika testov\u00E1n\u00ED je proto nutnost\u00ED. V \u010Dl\u00E1nku jsou uvedeny z\u00E1v\u011Bry pozorov\u00E1n\u00ED mikrostruktur 3 vysokopevnostn\u00EDch pomoc\u00ED sv\u011Bteln\u00E9 a \u0159\u00E1dkovac\u00ED elektronov\u00E9 mikroskopie. Mechanick\u00E9 vlastnosti byly testov\u00E1ny pomoc\u00ED Charpyho r\u00E1zov\u00E9 zkou\u0161ky a zkou\u0161ky lomov\u00E9 hou\u017Eevnatosti. Na poru\u0161en\u00FDch t\u011Blesech byla provedena fraktografick\u00E1 anal\u00FDza. P\u0159i r\u016Fzn\u00FDch podm\u00EDnk\u00E1ch zat\u011B\u017Eov\u00E1n\u00ED byly pozorov\u00E1ny zn\u00E1mky jak \u0161t\u011Bpn\u00E9ho, tak tv\u00E1rn\u00E9ho poru\u0161en\u00ED. Byly stanoveny p\u0159echodov\u00E9 k\u0159ivky a z\u00E1vislosti odporu materi\u00E1lu v\u016F\u010Di \u0161\u00ED\u0159en\u00ED trhliny na d\u00E9lce trhliny (J-Deltaa). Byly odhadnuty hodnoty lomov\u00FDch hou\u017Eevnatost\u00ED p\u0159i rovinn\u00E9 deformaci. Tento v\u00FDzkum byl proveden ve spolupr\u00E1ci s firmou \u0160KODA AUTO, a. s. a tak\u00E9 finan\u010Dn\u011B podpo\u0159en v r\u00E1mci projektu MSM 6840770021 Diagnostika materi\u00E1l\u016F."@cs . "RIV/68407700:21340/07:04134976" . . "Mechanical Properties of High Strength Steel Sheets" . . "[10729AB44D77]" . "21340" . . "5"^^ . "432577" . "Z(MSM6840770021)" . . . "Siegl, Jan" . . . . . . "This paper summarizes results of the research carried out on the high strength steel sheets (HSS) used in car industry. Appropriate testing procedure is therefore a must. Conclusions of microstructures observations of 3 different commercially available HSS by means of light and SEM microscopy are provided. Mechanical properties were tested by means of Charpy impact test and fracture toughness test. Fractographic analysis was carried out on the broken specimens. Signs of cleavage and ductile fracture were observed at different loading conditions. Ductile-to-brittle transition curves and tearing resistance curves (J-Deltaa) were determined. Values of fracture toughness under plain strain conditions were estimated. This research was carried out in cooperation with \u0160KODA AUTO, a. s. and also financially supported by project MSM 6840770021 Diagnostika materi\u00E1l\u016F." . "Charpy impact test; ductile-to-brittle transition; fractography; fracture toughness; high strength steels sheets"@en . . "Sl\u00E1ma, J." . "2007-02-19+01:00"^^ . "\u010Cesk\u00E9 vysok\u00E9 u\u010Den\u00ED technick\u00E9 v Praze" . "278;279" . "4"^^ . "This paper summarizes results of the research carried out on the high strength steel sheets (HSS) used in car industry. Appropriate testing procedure is therefore a must. Conclusions of microstructures observations of 3 different commercially available HSS by means of light and SEM microscopy are provided. Mechanical properties were tested by means of Charpy impact test and fracture toughness test. Fractographic analysis was carried out on the broken specimens. Signs of cleavage and ductile fracture were observed at different loading conditions. Ductile-to-brittle transition curves and tearing resistance curves (J-Deltaa) were determined. Values of fracture toughness under plain strain conditions were estimated. This research was carried out in cooperation with \u0160KODA AUTO, a. s. and also financially supported by project MSM 6840770021 Diagnostika materi\u00E1l\u016F."@en . "Mechanical Properties of High Strength Steel Sheets" . "RIV/68407700:21340/07:04134976!RIV08-MSM-21340___" . . . . .