Effect of Strain Rate, Adiabatic Heating and Phase Transformation Phenomena on the Mechanical Behaviour of Stainless Steel

Andrade‐Campos, A.; Teixeira-Dias, Filipe; Krupp, Ulrich; Barlat, Frédéric; Rauch, E.F.; Grácio, J.

doi:10.1111/j.1475-1305.2008.00572.x

Cited by 27 publications

(6 citation statements)

References 41 publications

(90 reference statements)

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“…This model does not account for any heating due to the exothermic austenite to martensite transition. The predicted temperature of the sample is given by Andrade-Campos et al (2010).…”

Section: Discussionmentioning

confidence: 99%

Effects of Unloading on Subsequent Yielding Behavior in 304 Stainless Steel

et al. 2021

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Forming operations are known to be complex, involving many strain states, strain rates, temperatures, strain paths, and friction conditions. Material properties, such as strength and ductility, are large drivers in determining if a material can be formed into a specific part, and for selecting the equipment required for the forming operation. Predicting yielding behavior in situations such as these has been done using yield surfaces to describe material yielding in specific stress states. These models typically use initial mechanical properties, and will require correction if the material has experienced previous straining. Here, we performed interrupted uniaxial tensile testing of a 304 stainless steel to observe the effects of unloading and subsequent reloading on yielding and tensile properties. An increase in yield point developed, in which a higher yield was observed prior to returning to the bulk work hardening behavior, and the magnitude of the yield point varied with unloading conditions and strain imposed. The appearance of a yield point is attributed to strain aging or dislocation trapping at obstacles within the matrix. These results suggest that both strain aging and dislocation trapping mechanisms may be active in the matrix, which may present challenges when forming austenitic stainless and new advanced high strength steels that likely show a similar behavior. These results provide a potential area for refinement in the calculation of yielding criteria that are currently used to predict forming behavior.

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“…This model does not account for any heating due to the exothermic austenite to martensite transition. The predicted temperature of the sample is given by Andrade-Campos et al (2010).…”

Section: Discussionmentioning

confidence: 99%

Effects of Unloading on Subsequent Yielding Behavior in 304 Stainless Steel

et al. 2021

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“…Gráfico da variação da energia livre e seus componentes térmico e mecânico em função da temperatura (adaptado de [11]).…”

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Nanoindentação Aplicada Aos Aços Inoxidáveis Austeníticos 304l E 201ln

Silva¹,

Souza²,

Casanova³

et al. 2017

Anais Do Congresso Anual Da ABM

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Resumo Com o objetivo de avaliar as condições estruturais via comportamento mecânico associada ao efeito TRIP realizou-se estudo comparativo das propriedades mecânicas de dois aços inoxidáveis austeníticos comerciais de graus 304L e 201LN. A martensita induzida por deformação foi formada durante a laminação a frio a temperatura ambiente até percentual de redução de espessura de 80% e avaliada via nanoindentação com cargas máximas de ensaio de 1, 20, 50 e 100 gf. Observou-se que as propriedades decresceram com o aumento das cargas utilizadas e apresentaram tendência de estabilização com as maiores cargas.

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“…It is well known that the majority of the plastic work is converted into heat (Farren and Taylor, 1925;Gao and Wagoner, 1987;Kim and Wagoner, 1987;Lin and Wagoner, 1987;Raghavan and Wagoner, 1987;Tugcu, 1995;Rusinek and Klepaczko, 2009;Andrade-Campos et al, 2010;Dumoulin et al, 2010;Sung et al, 2010). At the same time, a variety of physical processes that occur during, and due to, mechanical straining involve the additional generation or absorption of heat.…”

Section: Introductionmentioning

confidence: 99%

Ductility of 304 stainless steel under pulsed uniaxial loading

Cullen

2013

International Journal of Solids and Structures

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a b s t r a c tThe enhanced ductility that 304 stainless steel is exhibiting under pulsed loading (Zhang and Yuan, 2009) is investigated here using a combination of experiments and analysis. The simplest loading case, i.e., uniaxial tension, was selected to avoid the complicating effects of multiaxial stress states and/or contact and friction with a rigid die. Three types of tensile tests were performed: monotonic, pulsed and hold. For a range of strain rates, the pulsed and the hold tests exhibited different elongation-to-fracture from the monotonic tests. Digital image correlation and infrared thermography were employed to further probe this behavior. It was discovered that since the pulsed tests lasted longer than the corresponding monotonic ones (i.e., those with the same loading speed) but the total plastic work expended was comparable, milder deformation-induced heating developed in the pulsed tests. Since the resulting temperature gradients act as imperfections that trigger the localization of deformation, the enhanced elongation-to-fracture in the pulsed tests was attributed to the milder gradients that developed. Subsequently, a special isothermal tension test was used to de-couple the mechanical from the thermal behavior of the material and was repeated at various strain rates and temperatures. The material properties determined from this test were used as input to coupled, thermomechanical finite element simulations of the experiments. Despite numerous simplifications, such as constant thermal properties with temperature, the simulations captured the essential physics of the problem and yielded very close predictions of the elongation-tofracture observed in the experiments.

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Effect of Strain Rate, Adiabatic Heating and Phase Transformation Phenomena on the Mechanical Behaviour of Stainless Steel

Cited by 27 publications

References 41 publications

Effects of Unloading on Subsequent Yielding Behavior in 304 Stainless Steel

Effects of Unloading on Subsequent Yielding Behavior in 304 Stainless Steel

Nanoindentação Aplicada Aos Aços Inoxidáveis Austeníticos 304l E 201ln

Ductility of 304 stainless steel under pulsed uniaxial loading

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