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Bainite
About: Bainite is a research topic. Over the lifetime, 9520 publications have been published within this topic receiving 145305 citations.
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30 Oct 2012-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a new approach via Orientation Imaging Microscopy (OIM™) is developed to acquire quantitative microstructural data including bainite lath/packet and prior austenite grain size (PAG).
Abstract: The present study focuses on the correlations of microstructures, mechanical properties and heat inputs in friction stir welded HSLA-65 steel. A new approach via Orientation Imaging Microscopy (OIM™) is developed to acquire quantitative microstructural data including bainite lath/packet and prior austenite grain size (PAG). A linear relationship between heat input and quantitative microstructural data in the weld has been established. Mechanical properties exhibit a linear relationship with heat input. Yield strength is highly dependent on grain/lath size, which follows Hall–Petch relations. These correlations can be used to determine FSW weld parameters for desired mechanical properties welds.
60 citations
60 citations
TL;DR: In this paper, a Gleeble-3500 thermal simulator was used to simulate the welding thermal cycles of all of the sub-zones of the heat-affected zone (HAZ) of laser-welded specimens of DP1000 steel.
60 citations
TL;DR: In this paper, dual phase microstructures were produced in a low carbon steel, in which the martensite volume fraction was kept constant at two levels, of 18 and 25%, while the epitaxial ferrite content was varied independently.
Abstract: Dual phase microstructures were produced in a low carbon steel, in which the martensite volume fraction was kept constant at two levels, of 18 and 25%, while the epitaxial ferrite content was varied independently. The microstructures were produced with two dispersions of martensite, a relatively coarse dispersion by intercritical annealing of a ferrite/pearlite starting microstructure and a finer dispersion from an initial martensitic microstructure. Bauschinger tests were conducted using prestrains in both tension and compression of 0.4, 1, and 2.2%. Prestrain direction had no measurable effect on plastic flow behaviour after strain reversal. Mean back stresses increased with increasing strain and martensite content, and were higher for the finer martensite dispersion. They decreased significantly with increasing epitaxial ferrite content in the case of the finer dispersion, but less significantly in the coarser dispersion. These effects of microstructure are discussed in terms of stress transfer...
59 citations
59 citations