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Complete 7 pages APA formatted article: Processing-Microstructure-Property Relationships in Materials.
Complete 7 pages APA formatted article: Processing-Microstructure-Property Relationships in Materials. Bainite is found in steels at temperatures ranging between 250oF to 550oF in relation to the steel alloy content. Bainitic microstructures can be created in a multiplicity of steel deliberately to achieve a particular toughness and strength combination and are resistant to fatigue or creep deformation such as hydrogen embrittlement susceptibility. According to Mahnken & Schineidt (1826), Bainitic structures formed as a result of welding have detrimental effects on welded joint’s fracture toughness. The composition of bainitic steel includes carbon, iron, and another component from the aluminum or silicon group. The component added amounts to at least 1.5% of the bainitic steel total weight.
Processing of bainitic steel removes fine carbides giving rise to high resistance to void structures. This is an attribute in bainitic steel that engineers draw attention to and analyze in detail. This paper will review the relationship between microstructure, processing, and properties of bainitic steel.
2. Processing techniques A number of processing techniques for bainitic steel fabrication are under exploration. Bainite transformation is a proven elusive technique that involves the addition of silicon components to suppress the formation of cementite which leads to the resultant displacive reaction i.e. the transformation causes a stress-relieving outcome due to orientation relationships found in bainitic microstructures. Silicon addition results in a microstructure of retained austenite that make up wear-resistant steel.
According to Ershov&Nekrasova (109), there are two sets of transformations that provide a processing route and selecting the optimum steel to achieve a specific set of properties. These transformations are: Time-Temperature Transformation (TTT) and CCT (Continuous Cooling Transformation) (See figure 1 & 2)
Temperature (oC) increase is represented on the Y-axis while increasing time (S) is represented on the X-axis. .Bain and Davenport discovered a novel steel microstructure in the year 1920 which they temporarily referred to as martensite-troostite. Subsequently, troostite was named, the fine pearlite which was then called Bainite by Steel Corporation of the U.S and Bain’s colleagues. Bainite refers to a microstructure in acicular form. .
