"\u010Cesk\u00E9 vysok\u00E9 u\u010Den\u00ED technick\u00E9 v Praze" . . "RIV/68407700:21340/08:04147936!RIV09-MSM-21340___" . "Praha" . "Siegl, Jan" . "Praha" . "[60040C2034EC]" . . . . "3"^^ . "372264" . "High strength steel (HSS) sheets are used in the car industry for the construction of reinforcement parts due to their high strength and ability to absorb plastic deformation, which leads to the better crashworthiness of the car. Mechanical properties of HSSs are given by their fine microstructure. Nevertheless, it is necessary to join individual parts of the car body. For this purpose spot welding technology is very often used. Disadvantage of this technology is a fact that materials of the welded parts can be affected in the zone of the spot welds by introduced thermal field and grain growth, recrystallization, shrinkage cavities formation, or oxidation can occur. Such defects can deteriorate mechanical properties of the whole structure. It is important to be sure that spot welds do not influence the materials performance beyond a tolerable limit. This research succeeds our previous studies in which fracture and impact toughness of several grades of HSS sheets were evaluated."@en . . "978-80-01-04016-4" . "3"^^ . "Vysokopevnostn\u00ED oceli se pou\u017E\u00EDvaj\u00ED v automobilov\u00E9m pr\u016Fmyslu pro jejich vysokou pevnost a schopnost absorbovat plastickou deformaci, co\u017E vede k zv\u00FD\u0161en\u00ED n\u00E1razov\u00E9 odolnosti automobilu. Mechanick\u00E9 vlastnosti vysokopevnostn\u00EDch ocel\u00ED jsou d\u00E1ny jejich jemnozrnnou mikrostrukturou. Je ale t\u0159eba spojovat r\u016Fzn\u00E9 \u010D\u00E1sti konstrukce, k \u010Demu\u017E se \u010Dasto pou\u017E\u00EDv\u00E1 bodov\u00E9ho sv\u00E1\u0159en\u00ED. Nev\u00FDhodou t\u00E9to technologie je, \u017Ee materi\u00E1l sva\u0159ovan\u00FDch \u010D\u00E1st\u00ED m\u016F\u017Ee b\u00FDt v okol\u00ED svaru ovlivn\u011Bn vnesen\u00FDm teplotn\u00EDm polem, co\u017E m\u016F\u017Ee v\u00E9st k r\u016Fstu zrna, rekrystalizaci, sta\u017Eenin\u00E1m \u010Di oxidaci. Tyto jevy zhor\u0161uj\u00ED mechanick\u00E9 vlastnosti cel\u00E9 struktury. Je d\u016Fle\u017Eit\u00E9 zajistit, aby bodov\u00FD svar nezhor\u0161il vlastnosti materi\u00E1lu p\u0159es p\u0159\u00EDpustnou mez. Tato studie navazuje na na\u0161i p\u0159edchoz\u00ED pr\u00E1ci, ve kter\u00E9 byla stanovov\u00E1na lomov\u00E1 a vrubov\u00E1 hou\u017Eevnatost n\u011Bkolika typ\u016F vysokopevnostn\u00EDch ocel\u00ED."@cs . . "Influence of Spot Welds on Mechanical Performance of High Strength Steel Sheets" . "High strength steel (HSS) sheets are used in the car industry for the construction of reinforcement parts due to their high strength and ability to absorb plastic deformation, which leads to the better crashworthiness of the car. Mechanical properties of HSSs are given by their fine microstructure. Nevertheless, it is necessary to join individual parts of the car body. For this purpose spot welding technology is very often used. Disadvantage of this technology is a fact that materials of the welded parts can be affected in the zone of the spot welds by introduced thermal field and grain growth, recrystallization, shrinkage cavities formation, or oxidation can occur. Such defects can deteriorate mechanical properties of the whole structure. It is important to be sure that spot welds do not influence the materials performance beyond a tolerable limit. This research succeeds our previous studies in which fracture and impact toughness of several grades of HSS sheets were evaluated." . "Z(MSM6840770021)" . . . "Vliv bodov\u00FDch svar\u016F na mechanick\u00E9 vlastnosti vysokopevnostn\u00EDch ocelov\u00FDch plech\u016F"@cs . . . "21340" . "Charpy impact test; fracture behavior; high strength steel; microhardness; spot weld"@en . "Proceedings of Workshop 2008" . "Influence of Spot Welds on Mechanical Performance of High Strength Steel Sheets"@en . . . "Hau\u0161ild, Petr" . "Influence of Spot Welds on Mechanical Performance of High Strength Steel Sheets"@en . . . "Influence of Spot Welds on Mechanical Performance of High Strength Steel Sheets" . . "Vliv bodov\u00FDch svar\u016F na mechanick\u00E9 vlastnosti vysokopevnostn\u00EDch ocelov\u00FDch plech\u016F"@cs . . . "2"^^ . . "2008-02-18+01:00"^^ . "Mu\u0161\u00E1lek, Radek" . . "RIV/68407700:21340/08:04147936" . .