Search Results for phase transformation kinetics

Engineers at the Ford Motor Co. are using integrated computational materials engineering (ICME) tools, allowing them to accurately simulate the heat treatment of gears and predict phase transformation kinetics and distortion.

A dilatometry test is an effective method for characterizing the phase transformation kinetics for heat treatment processing of steels. This study uses computer modeling to examine the root causes of inaccuracies in measured dilatometry displacement data using a quench dilatometer.

Properties and performance of lower cost “simple” alloy steels processed using induction coupled thermomagnetic processing can rival those of conventionally processed, expensive specialty alloys. This article discusses some of the demonstrated improved mechanical properties achieved for steels in a industry-government project that evaluated the viability of processing metals in a strong magnetic field.

New research explores a zirconia-based shape memory ceramic that exhibits a unique type of electrically triggered martensitic transformation.

This article describes a planned three-year research project at the Center for Heat Treating Excellence (CHTE) at Worcester Polytechnic Institute (WPI) to help the heat treat industry better understand process parameters related to austempering of steels. This research will enable the industry to identify the potential strength, toughness, and cost benefits of bainitic steels over martensitic steels and provide guidance on the design, validation, and control of heat treating processes to produce bainitic microstructures in steels.

Meet Zi-Kui Liu, FASM, the new president of ASM, and learn about his academic and scientific background, professional service, and contributions as a researcher and educator.

Affordable bulk production of a newly developed nanostructured bainitic steel is possible without using severe deformation or complex heat treatments. This article discusses the characteristics and significance of nanostructured bainite in terms of the transformation mechanism.

A new approach aims to fabricate parts with targeted, site-specific properties for a wide range of applications in extreme environments within the aviation, space, and energy sectors.

An industry pioneer shares a historical overview of the early days of single crystal superalloy development.

An in-depth understanding of technology trends not only keep materials engineers relevant, but also puts them in the driver’s seat when it comes to formulating strategies and executing projects. Some of today’s technology trends that are relevant to materials engineers include data analytics, artificial intelligence (machine learning and deep learning), blockchain, digital thread and digital twins, Internet of Things (IoT) or Industry 4.0, additive manufacturing, electric vehicles, and autonomous vehicles.

Computational thermodynamics and CALPHAD modeling prove useful for selecting and developing new magnesium alloys. This article summarizes an ongoing effort to establish a scientific foundation of computational thermodynamics and kinetics of magnesium alloys to achieve accelerated design and optimization of these alloys for weight reduction in the transportation industries.

Coupling a high magnetic field environment with an applied induction elevated temperature capability can achieve stronger, more durable components and materials with improved performance. This article describes work to develop high magnetic field processing technology.

New thermal and cold spray technologies are being developed to extend the lifespan of thermal barrier coating (TBC) systems at elevated temperatures. This article describes the relevant attributes of coating technologies such as high velocity air fuel, high velocity air plasma spray, and high pressure cold spray for use in TBC systems.

Production techniques based on net shape forming from the liquid or semisolid state offer advantages in terms of manufacturing simplicity, cost, and energy consumption compared with current complex solid state forming processes. Engineering molten alloys to change their solidification process improves part integrity and alloy microstructure, leading to better component performance.

This article presents a broad overview of key annealing processes such as recovery, recrystallization, and grain growth in magnesium and its alloys. It explores the role of recovery in recrystallization behavior, evolution of recrystallization microstructure and texture, current understanding of grain coarsening in magnesium alloys, and concludes with a perspective on future research.

Manufacturing data together with heat treating knowledge can be synthesized with physics and data-based modeling approaches in a closed loop to provide insight for improving process efficiency and product quality for overall reduction in operating and energy costs. This article provides case studies of data analytics for coil batch annealing and batch carburizing.

The discovery of new phases of carbon and direct conversion of carbon into diamond and diamond-like materials—at ambient conditions and without a catalyst—is a breakthrough with tremendous potential for electronics and hard-materials applications.

High strength, corrosion-resistant Ferrium C64 is the culmination of a rigorous design process that bypassed extensive physical experimentation—delivering a carburizable steel with unmatched capability.

Scientists and engineers working on behalf of the U.S. automotive industry are nearing completion of a multiyear effort to accelerate the incorporation of advanced high-strength steels in American-made cars and trucks. This article reports on work to develop and validate an integrated computational materials engineering (ICME) model optimized for third-generation advanced high-strength steels.

Selective-melt sintering is faster and more efficient than the methods currently used to make high-density ceramics. This article explains how applied electric fields contribute to the formation of metallic precipitates at grain boundaries and how defect segregation and field-assisted migration generate heat near dislocations and in grain boundaries, reducing flow stress and retarding grain growth in the solid state.