ISSN 2594-5297
59º Seminário de Laminação, Conformação de Metais e Produtos — vol. 59, num.59 (2024)
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THE PRESENT WORK ANALYZED THE HOT BEHAVIOR OF AN NB-TI MICRO-ALLOYED STEEL USING PHYSICAL SIMULATION AND CONSTITUTIVE MODELING. PLANE-STRAIN COMPRESSION TESTS WERE PERFORMED IN THE GLEEBLE 3500 THERMOMECHANICAL SYSTEM UNDER SEVERAL DEFORMATION TEMPERATURES (950-1150 OC) AND NOMINAL STRAIN RATES (0.01-10 S-1). THE FLOW-STRESS CURVES EXHIBITED TYPICAL DYNAMIC RECRYSTALLIZATION EFFECTS UNDER HIGHER DEFORMATION TEMPERATURES (> 1050 OC, 0.1-1 S-1 AND AT 1150 OC, 10 S-1) AND AT THE LOWEST STRAIN-RATE (> 1050 OC, 0.01 S-1) AND DYNAMIC RECOVERY AT LOWER DEFORMATION TEMPERATURES (950 AND 1000 OC). THE RESULTING EXPERIMENTAL DATA ALLOWED US TO CALCULATE THE AVERAGE THERMAL ACTIVATION ENERGY FOR HOT DEFORMATION AS 387.4 KJ/MOL. MOREOVER, THE MATERIAL PARAMETERS OF THE HYPERBOLIC SINE LAW CONSTITUTIVE EQUATION WERE DETERMINED, ALLOWING US TO PREDICT THE EXPERIMENTAL PEAK STRESS WITH A GOOD MEASURE OF THE CORRELATION COEFFICIENT (0.987) AND A LOW AVERAGE ABSOLUTE RELATIVE ERROR (2.6%).
THE PRESENT WORK ANALYZED THE HOT BEHAVIOR OF AN NB-TI MICRO-ALLOYED STEEL USING PHYSICAL SIMULATION AND CONSTITUTIVE MODELING. PLANE-STRAIN COMPRESSION TESTS WERE PERFORMED IN THE GLEEBLE 3500 THERMOMECHANICAL SYSTEM UNDER SEVERAL DEFORMATION TEMPERATURES (950-1150 OC) AND NOMINAL STRAIN RATES (0.01-10 S-1). THE FLOW-STRESS CURVES EXHIBITED TYPICAL DYNAMIC RECRYSTALLIZATION EFFECTS UNDER HIGHER DEFORMATION TEMPERATURES (> 1050 OC, 0.1-1 S-1 AND AT 1150 OC, 10 S-1) AND AT THE LOWEST STRAIN-RATE (> 1050 OC, 0.01 S-1) AND DYNAMIC RECOVERY AT LOWER DEFORMATION TEMPERATURES (950 AND 1000 OC). THE RESULTING EXPERIMENTAL DATA ALLOWED US TO CALCULATE THE AVERAGE THERMAL ACTIVATION ENERGY FOR HOT DEFORMATION AS 387.4 KJ/MOL. MOREOVER, THE MATERIAL PARAMETERS OF THE HYPERBOLIC SINE LAW CONSTITUTIVE EQUATION WERE DETERMINED, ALLOWING US TO PREDICT THE EXPERIMENTAL PEAK STRESS WITH A GOOD MEASURE OF THE CORRELATION COEFFICIENT (0.987) AND A LOW AVERAGE ABSOLUTE RELATIVE ERROR (2.6%).
Palavras-chave
Nb-Ti micro-alloyed steel; Physical simulation; Constitutive modeling; Hot rolling.
Nb-Ti micro-alloyed steel; Physical simulation; Constitutive modeling; Hot rolling.
Como citar
SANTIAGO, GABRIEL AUGUSTO DE AVILA;
LEITE, DUÍLIO NORBERTO FERRONATTO;
MOREIRA, LUCIANO PESSANHA;
MUDESTO, BRUNO FERNANDES;
VENTURA, HARISON DA SILVA;
SILVA, MELINA GAMIS DA;
SOARES, JULLY RAMOS.
FLOW-STRESS BEHAVIOR AND CONSTITUTIVE MODELING OF A HOT ROLLED NB-TI STEEL
,
p. 186-196.
In: 59º Seminário de Laminação, Conformação de Metais e Produtos,
São Paulo, Brasil,
2024.
ISSN: 2594-5297
, DOI 10.5151/2594-5297-40844
