Analysis of Mechanical Behavior and Microstructural Characteristics Change of ASTM A-36 Steel Applying Various Heat Treatment

Abstract

In this study ASTM A-36 (mild steel) is selected as specimen for testing various mechanical properties and microstructure change. The effects of heat treatment on the mechanical properties and microstructure characteristics change of selected specimen are analyzed. Annealing, hardening and tempering are the most important heat treatment processes often used to change mechanical properties of engineering materials. The purpose of heat treating is to analyze the mechanical properties of the steel, usually ductility, hardness, Yield strength, tensile strength and impact resistance. The heat treatment develops hardness, softness, and improves the mechanical properties such as tensile strength, yield strength, ductility, corrosion resistance and creep rupture. These processes also help to improve machining effect, and make them versatile. The mechanical properties can easily be modified by heat treating to suit a particular design purpose. In the present study, selected samples are heat-treated at certain temperature above the austenitic region and quenched in order to investigate the effect on the mechanical properties microstructure of the mild steel. The changes in mechanical behavior and microstructure as compared with unquenched samples are explained in terms of changes in tensile strength. Results showed that the mechanical properties of mild steel can be changed and improved by various heat treatments for a particular application.

Analysis of the influence of hot rolled plate steel treatment using temper and quench-temper method on vickers hardness number enhancement

“…The way to overcome the difficulties is by means of the stages of bending, heat treatment with a temperature of 900 °С then quenching with water to see an increase in the material hardness through the Vickers test, to see the impact energy with the Charpy test method while to see the microstructure of the material with micro photos. [16], knowing the impact of the metal forming process, used the term plastic deformation equation, a process in which the force or load applied to a bent steel plate will permanently deform. [16] showed the results of metal formation were reversible or irreversible depending on the type of material; the size and geometry of the object and the magnitude of the force exerted on the object.…”

“…[16], knowing the impact of the metal forming process, used the term plastic deformation equation, a process in which the force or load applied to a bent steel plate will permanently deform. [16] showed the results of metal formation were reversible or irreversible depending on the type of material; the size and geometry of the object and the magnitude of the force exerted on the object. The results of microstructural observations show that the applied load causes an increase in grain size and hardness in each bent specimen, as well as quenching and tempering heat treatments.…”

Prediction of Microstructure Constituents’ Hardness after the Isothermal Decomposition of Austenite

“…The process of steel quenching is one of the physically most complicated engineering processes which involves many physical processes, such as microstructure transformations, heat exchange, heat transfer and heat conduction, generation of distortion and residual stresses and crack formation [1][2][3][4][5][6][7][8][9][10].…”

The Effect of Quenching on High-temperature Heat Treated Mild Steel and its Corrosion Resistanc

“…Carbon steel, due to its extensive use, can be classified into three different categories based on its carbon content: low carbon steel (mild steel); medium carbon steel; and high carbon steel (Fadara et al, 2011). Mild steel is a type of low-carbon steel, which is cheap and easy to alter its mechanical properties (Hassan, 2016). The low carbon content of this steel gives lower tensile strength when compared with high carbon alloy steel (Alves et al, 2013;Ahaneku et al, 2013;Xiaohui et al, 2018;Roland et al, 2018;Kazeem & Esther, 2018;Elewa et al, 2021;Joseph & Alo, 2014).…”