Solidification and phase transformation in AISI 1045 steel laser surface alloyed with TiC

The objective of the present work is to simulate surface roughness in Computer Numerical Controlled (CNC) machine by Fuzzy Modeling of AISI 1045 Steel. To develop the fuzzy model; cutting depth, feed rate and speed are taken as input process parameters. The predicted results are compared with reliable set of experimental data for the validation of fuzzy model. Based upon reliable set of experimental data by Response Surface Methodology twenty fuzzy controlled rules using triangular membership function are constructed. By intelligent model based design and control of CNC process parameters, we can enhance the product quality, decrease the product cost and maintain the competitive position of steel.

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Evaluation of the characteristics of an AISI 1045 steel quenched in different concentration of polymer solutions of polyvinylpyrrolidone

Scientific Reports ◽

10.1038/s41598-020-79060-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Eduardo da Rosa Vieira ◽

Luciano Volcanoglo Biehl ◽

Jorge Luis Braz Medeiros ◽

Vagner Machado Costa ◽

Rodrigo Jorge Macedo

Keyword(s):

Microstructural Characterization ◽

Exchange Capacity ◽

X Ray Diffraction ◽

Thermal Exchange ◽

The Core ◽

Aisi 1045 Steel ◽

Aisi 1045 ◽

Quench Hardening ◽

Polymeric Solutions ◽

1045 Steel

AbstractQuench hardening aims at the microstructural transformation of steels in order to improve hardness and mechanical strength. The aim phase is, in most cases, the martensite. It is necessary to heat the material until it obtains its austenitization and quenching by immersion in a fluid. Currently, it is common to use watery polymeric solutions in this procedure. These fluids, which are the mixture of polymers in water, vary their thermal exchange capacity depending on the concentrations applied. The increase in concentration minimizes the removal of heat from the part, reducing the formation capacity of martensite, and developing a lower hardness and strong steel. In this work, microstructural characteristics and properties of AISI 1045 steel quenched in solutions based on polyvinylpyrrolidone (PVP) in 10, 15, 20, and 25% concentration were evaluated. The microstructural characterization quantified the percentage of the phases in each concentration, demonstrating a reduction of martensite as the concentrations were high. The investigation of the samples by x-ray diffraction confirmed the absence of austenite retained in the material. Furthermore, a microhardness scale between the core and the surface was constructed, in which a reduction gradient of the indices of this property towards the core of the sample was evidenced.

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Effect of Laser Heat Treatment on the Mechanical Performance and Microstructural Evolution of AISI 1045 Steel-2017-T4 Aluminum Alloy Joints during Rotary Friction Welding

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-05614-6 ◽

2021 ◽

Author(s):

José Luis Mullo ◽

Jorge Andrés Ramos-Grez ◽

Germán Omar Barrionuevo

Keyword(s):

Heat Treatment ◽

Aluminum Alloy ◽

Microstructural Evolution ◽

Friction Welding ◽

Mechanical Performance ◽

Laser Heat Treatment ◽

Rotary Friction Welding ◽

Aisi 1045 Steel ◽

Aisi 1045 ◽

1045 Steel

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Correction and accuracy improvement of non-parallel shear zone model

MATEC Web of Conferences ◽

10.1051/matecconf/201820702002 ◽

2018 ◽

Vol 207 ◽

pp. 02002

Author(s):

Yaoke Wang ◽

Meng Kou ◽

Wei Ding ◽

Huan Ma ◽

Liangshan Xiong

Keyword(s):

Experimental Data ◽

Cutting Force ◽

Shear Zone ◽

Coordinate Transformation ◽

Chip Thickness ◽

Zone Model ◽

Aisi 1045 Steel ◽

Aisi 1045 ◽

Experimental Values ◽

1045 Steel

When applying the non-parallel shear zone model to predict the cutting process parameters of carbon steel workpiece, it is found that there is a big error between the prediction results and the experimental values. And also, the former approach to obtain the relevant cutting parameters of the non-parallel shear zone model by applying coordinate transformation to the parallel shear zone model has a theoretical error – it erroneously regards the determinant (|J|) of the Jacobian matrix (J) in the coordinate transformation as a constant. The shape of the shear zone obtained when |J| is not constant is drew and it is found that the two boundaries of the shear zone are two slightly curved surfaces rather than two inclined planes. Also, the error between predicted values and experimental values of cutting force and cutting thrust is slightly smaller than that of constant |J|. A corrected model where |J| is a variable is proposed. Since the specific values of inclination of the shear zone (α, β), the thickness coefficient of the shear zone (as) and the constants related to the material (f0, p) are not given in the former work, a method to obtain the above-mentioned five constants by solving multivariable constrained optimization problem based on experimental data was also proposed; based on the obtained experimental data of AISI 1045 steel workpiece cutting force, cutting thrust, chip thickness, the results of five above-mentioned model constants are obtained. It is found that, compared with prediction from uncorrected model, the cutting force and cutting thrust of AISI 1045 steel predicted by the corrected model with the obtained constants has a better agreement with the experimental values obtained by Ivester.

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