"Mu\u0161\u00E1lek, Radek" . "Mechanical Properties and Fracture Behavior of High-Strength Steels"@en . . "Typical thicknesses of high-strength steels (HSS) sheets used in the car industry are inapplicable for standardized testing procedures. The aim of this study is to propose an appropriate methodology for testing and comparing of thin HSS sheets. Microstructures were observed by means of light and scanning electron microscopy. The modified Charpy impact tests and fracture toughness tests were used in order to compare the fracture properties of three different HSS sheets (Docol 1200 M, Multiphase 1200 and BTR 165). Ductile-to-brittle transition curves and tearing resistance (J-\u0394a) curves were measured. From the fracture toughness linked to the specimen thicknesses the value of fracture toughness KIc was estimated. Fractographic analysis of broken specimens has revealed that due to the fine microstructure of mixed ferrite-martensite fracture mechanism remains ductile even at low temperatures (down to -100 \u00B0C)." . . "Siegl, Jan" . "Mechanical Properties and Fracture Behavior of High-Strength Steels" . "Z(MSM6840770021)" . . "4"^^ . . . "Sl\u00E1ma, J." . . . . "Bensch, Jan" . "Strength of Materials" . "1" . "RIV/68407700:21340/08:04147926!RIV09-MSM-21340___" . "21340" . "Mechanick\u00E9 vlastnosti a lomov\u00E9 chov\u00E1n\u00ED vysokopevnostn\u00EDch ocel\u00ED"@cs . "Typical thicknesses of high-strength steels (HSS) sheets used in the car industry are inapplicable for standardized testing procedures. The aim of this study is to propose an appropriate methodology for testing and comparing of thin HSS sheets. Microstructures were observed by means of light and scanning electron microscopy. The modified Charpy impact tests and fracture toughness tests were used in order to compare the fracture properties of three different HSS sheets (Docol 1200 M, Multiphase 1200 and BTR 165). Ductile-to-brittle transition curves and tearing resistance (J-\u0394a) curves were measured. From the fracture toughness linked to the specimen thicknesses the value of fracture toughness KIc was estimated. Fractographic analysis of broken specimens has revealed that due to the fine microstructure of mixed ferrite-martensite fracture mechanism remains ductile even at low temperatures (down to -100 \u00B0C)."@en . "Typick\u00E9 vlastnosti vysokopevnostn\u00EDch ocelov\u00FDch plech\u016F pou\u017E\u00EDvan\u00FDch v automobilov\u00E9m pr\u016Fmyslu jsou nepou\u017Eiteln\u00E9 pro standardizovan\u00E9 zkou\u0161ky. C\u00EDlem t\u00E9to studie bylo navrhnout vhodnou metodiku pro jejich zkou\u0161en\u00ED. Mikrostruktury byly pozorov\u00E1ny pomoc\u00ED sv\u011Bteln\u00E9 a elektronov\u00E9 mikroskopie. Modifikovan\u00E1 Charpyho zkou\u0161ka a zkou\u0161ka lomov\u00E9 hou\u017Eevnatosti byly pou\u017Eity pro srovn\u00E1n\u00ED lomov\u00FDch vlastnost\u00ED t\u0159\u00ED r\u016Fzn\u00FDch vysokopevnostn\u00EDch ocel\u00ED (Docol 1200 M, Multiphase 1200 and BTR 165). Byly stanoveny p\u0159echodov\u00E9 k\u0159ivky a charakterizov\u00E1na odolnost proti \u0161\u00ED\u0159en\u00ED trhliny (J-\u0394a k\u0159ivky). Z hodnoty lomov\u00E9 hou\u017Eevnatosti pro danou tlou\u0161\u0165ku byla odhadnuta hodnota lomov\u00E9 hou\u017Eevnatosti KIc pro stav rovinn\u00E9 deformace. Na poru\u0161en\u00FDch t\u011Blesech byla provedena fraktografick\u00E1 anal\u00FDza, kter\u00E1 odhalila, \u017Ee d\u00EDky sm\u00ED\u0161en\u00E9 feriticko-martenzitick\u00E9 struktru\u0159e doch\u00E1z\u00ED k tv\u00E1rn\u00E9mu poru\u0161en\u00ED i p\u0159i n\u00EDzk\u00FDch teplot\u00E1ch (a\u017E do -100 \u00B0C)."@cs . "5"^^ . . "RIV/68407700:21340/08:04147926" . . . "40" . "0039-2316" . "Mechanical Properties and Fracture Behavior of High-Strength Steels"@en . "Hau\u0161ild, Petr" . "[FBA45BF7389B]" . . "000262960300037" . "Charpy impact test; fractography; fracture toughness; high-strength steels"@en . . . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Mechanick\u00E9 vlastnosti a lomov\u00E9 chov\u00E1n\u00ED vysokopevnostn\u00EDch ocel\u00ED"@cs . . . "378247" . . "Mechanical Properties and Fracture Behavior of High-Strength Steels" . . "4"^^ .