Mathematical Modelling of the Stress-Strain Curve for 31VMn12 Ecological Steel

Abstract

In this paper, optimum hot formation processing parameters for 31VMn12 steel were established, the torsion deformation of 31VMn12 steel was investigated at temperatures from 900, 1000, 11000C and strain rates from 0.05 s-1 to 3 s. -1. There were studied the structural aspects of materials, in microstructures by electronic microscopy. The stress level decreases with increasing deformation temperature and decreasing strain rate, which can be represented by a Zenner-Hollomon parameter. The mathematical model presented in the paper describes the relationship of tension strain, voltage and temperature coefficient 31VMn12 steel at high temperatures. The stress-strain curves determined by the torsion test allowed the calculation of the Zenner-Hollomon parameter corresponding to the maximum stress. By using this parameter has established a set of equations that reproduce completely stress-strain curve, including the hardening, the restoration and dynamic recrystallization area. Comparisons were made between the experimental results and the predicted and confirmed that constitutive equations developed can be used for mathematical modelling and other attempts (forging, compression) and other types of steel.

Study Deformability Ecological Steel (41Cr4)

“…Ultimate strength, R r was computed as follows (tensile strength): (6) where: F max -maximum force indicated at the tensile testing machine [daN]; S -initial section of the specimen in calibrated area [mm 2 ].…”

“…A friendly technology with the environment which consists in the elaboration of carbon steels through specific proceedings to powder metallurgy has in view the contribution of methane gas in iron powders at the same time with sintering. This technology is advantageous from various points of view: the final product is a part which does not need afterward processing with solid waste result and therefore the specific energy consume is lower, the wear and corrosion behavior is similar to that of classic steels and better than that of sintered steels obtained through mixing iron and graphite; the obtained steels is also a recycling material [5,6,9]. The carbon steel obtained through this new technology is an ecomaterial, energy consumption and reduced environmental pollution [4,8,15].…”

“…From an environmental perspective, the steel is durable and 100% recyclable [1, 11, 13, 16, 19 -23]. It is useful to use environment-friendly materials to reduce pollution [2,6,16].…”

Researches Regarding the Influence of Alloying Elements on the Mechanical Properties of Lamellar Graphite Cast Iron

“…Iron hardness decreases to increase ferrite content and increases in increasing cementite and phosphorus content [16][17][18][19]. [20][21][22][23][24][25].Cast iron with the best wear-resistance properties is of a highphosphate-rich, high-phosphate base and thick graphite blades, as shown in figures 1-4. The gray cast iron has the structural component characteristic of the gray lamellar graphite visible on polished samples.…”

Research on the Mechanical Characteristics of a Microalloyed Steel with V in the Agreement with Environmental Trends

“…These catalysts, together with other vanadium waste are subject processing by recycling [14,29]. Steels microalloyed with V are used for metal structures: containers, bridges, equipment for constructions [15,16,18,19].…”