"Kalousek, Jaroslav" . . "Mechanika Zeszyty Naukowe" . . "89" . . "Vyhodnocen\u00ED heterogenity svarov\u00E9ho spoje modelov\u00E1n\u00EDm dif\u00FAze substitu\u010Dn\u00EDch prvk\u016F"@cs . "27360" . . . "Assessment of heterogeneity of welded joint by modelling of diffusion of substitution elements"@en . "RIV/61989100:27360/07:00015803" . "PL - Polsk\u00E1 republika" . . . "P\u0159\u00EDsp\u011Bvek p\u0159edkl\u00E1d\u00E1 p\u016Fvodn\u00ED v\u00FDsledky modelov\u00E1n\u00ED dif\u00FAze vybran\u00FDch substitu\u010Dn\u00EDch prvk\u016F ve svarov\u00E9m spoji ocel\u00ED, tvo\u0159en\u00E9m n\u00EDzkolegovanou CrNiMoV ocel\u00ED a n\u00EDzkolegovanou k\u0159em\u00EDkovou ocel\u00ED, na z\u00E1klad\u011B vyhodnocen\u00ED experiment\u00E1ln\u011B zm\u011B\u0159en\u00FDch koncentra\u010Dn\u00EDch dat. M\u011B\u0159en\u00ED redistribuce p\u0159\u00EDslu\u0161n\u00FDch substitu\u010Dn\u00EDch prvk\u016F bylo prov\u00E1d\u011Bno v teplotn\u00EDm intervalu 500 ? 1000\u00B0C. Rozlo\u017Een\u00ED vybran\u00FDch prvk\u016F kolmo p\u0159es svarov\u00E9 rozhran\u00ED se zji\u0161\u0165ovalo pomoc\u00ED energiov\u011B disperzn\u00ED (ED) rtg. mikroanal\u00FDzy. Teoretick\u00FDm z\u00E1kladem vyhodnocen\u00ED koncentra\u010Dn\u00EDch profil\u016F je 2. Fick\u016Fv z\u00E1kon. Parametry dif\u00FAzn\u00ED rovnice se ur\u010Dovaly metodou neline\u00E1rn\u00ED regrese. T\u0159i soubory koncentra\u010Dn\u00EDch dat analyzovan\u00FDch prvk\u016F, nam\u011B\u0159en\u00FDch na jednotliv\u00FDch vzorc\u00EDch, vedly k v\u00FDpo\u010Dtu dif\u00FAzn\u00EDch koeficient\u016F p\u0159\u00EDslu\u0161n\u00FDch substitu\u010Dn\u00EDch prvk\u016F a dal\u0161\u00EDch parametr\u016F dif\u00FAzn\u00ED rovnice. P\u016Fvodn\u00ED je zde adaptace Levenberg-Marquardtova algoritmu pro \u0159e\u0161en\u00ED optimalizace parametr\u016F dif\u00FAzn\u00ED rovnice. Metodiku ilustruj\u00ED p\u0159\u00EDklady z redistribuce niklu."@cs . . "Assessment of heterogeneity of welded joint by modelling of diffusion of substitution elements"@en . . . "Vyhodnocen\u00ED heterogenity svarov\u00E9ho spoje modelov\u00E1n\u00EDm dif\u00FAze substitu\u010Dn\u00EDch prvk\u016F" . . "diffusion; welded joint of steels; modelling; redistribution of nickel"@en . "Z(MSM6198910013)" . "Str\u00E1nsk\u00FD, Karel" . "Dobrovsk\u00E1, Jana" . "459408" . . "[26EF62E4E1A5]" . . "RIV/61989100:27360/07:00015803!RIV09-MSM-27360___" . "The paper presents original results of methodology for evaluation of experimental data at diffusion of selected substitution elements in the welded joint of steels, made from low-alloy steel CrNiMoV and low-alloy silicon steel. The measurement of redistribution of given substitution elements was made in temperature interval 500 - 1000\u00B0C. Distribution of selected elements perpendicularly across welded boundary was determined with use of energy dispersive (ED) X-ray micro-analysis. Solution of the 2nd Fick?s law on one-dimensional diffusion with suitable boundary conditions was theoretical basis for evaluation of concentration profiles. Parameters of diffusion equation were determined by method of non-linear regression. Three sets of measured concentration data lead to calculation of diffusion coefficients of analysed substitution elements and other parameters of diffusion equation. Adaptation of the Levenberg-Marquardt?s algorithm for solution of optimisation of parameters of diffusion equation, is a"@en . "P\u0159\u00EDsp\u011Bvek p\u0159edkl\u00E1d\u00E1 p\u016Fvodn\u00ED v\u00FDsledky modelov\u00E1n\u00ED dif\u00FAze vybran\u00FDch substitu\u010Dn\u00EDch prvk\u016F ve svarov\u00E9m spoji ocel\u00ED, tvo\u0159en\u00E9m n\u00EDzkolegovanou CrNiMoV ocel\u00ED a n\u00EDzkolegovanou k\u0159em\u00EDkovou ocel\u00ED, na z\u00E1klad\u011B vyhodnocen\u00ED experiment\u00E1ln\u011B zm\u011B\u0159en\u00FDch koncentra\u010Dn\u00EDch dat. M\u011B\u0159en\u00ED redistribuce p\u0159\u00EDslu\u0161n\u00FDch substitu\u010Dn\u00EDch prvk\u016F bylo prov\u00E1d\u011Bno v teplotn\u00EDm intervalu 500 ? 1000\u00B0C. Rozlo\u017Een\u00ED vybran\u00FDch prvk\u016F kolmo p\u0159es svarov\u00E9 rozhran\u00ED se zji\u0161\u0165ovalo pomoc\u00ED energiov\u011B disperzn\u00ED (ED) rtg. mikroanal\u00FDzy. Teoretick\u00FDm z\u00E1kladem vyhodnocen\u00ED koncentra\u010Dn\u00EDch profil\u016F je 2. Fick\u016Fv z\u00E1kon. Parametry dif\u00FAzn\u00ED rovnice se ur\u010Dovaly metodou neline\u00E1rn\u00ED regrese. T\u0159i soubory koncentra\u010Dn\u00EDch dat analyzovan\u00FDch prvk\u016F, nam\u011B\u0159en\u00FDch na jednotliv\u00FDch vzorc\u00EDch, vedly k v\u00FDpo\u010Dtu dif\u00FAzn\u00EDch koeficient\u016F p\u0159\u00EDslu\u0161n\u00FDch substitu\u010Dn\u00EDch prvk\u016F a dal\u0161\u00EDch parametr\u016F dif\u00FAzn\u00ED rovnice. P\u016Fvodn\u00ED je zde adaptace Levenberg-Marquardtova algoritmu pro \u0159e\u0161en\u00ED optimalizace parametr\u016F dif\u00FAzn\u00ED rovnice. Metodiku ilustruj\u00ED p\u0159\u00EDklady z redistribuce niklu." . . . "4"^^ . "Vyhodnocen\u00ED heterogenity svarov\u00E9ho spoje modelov\u00E1n\u00EDm dif\u00FAze substitu\u010Dn\u00EDch prvk\u016F"@cs . "Vyhodnocen\u00ED heterogenity svarov\u00E9ho spoje modelov\u00E1n\u00EDm dif\u00FAze substitu\u010Dn\u00EDch prvk\u016F" . "6"^^ . "4"^^ . . "1429-6063" . . . "\u0158eh\u00E1\u010Dkov\u00E1, Lenka" . . "321" .