Improving lightweight materials processing for automotive by using intercritical annealing

“Fat men cannot run as fast as thin men, but we build most of our vehicles as though deadweight fat increased speed…. I cannot imagine where the delusion that weight means strength came from….” - Henry Ford. Fuel efficiency and safety innovations are the most important consumer consideration purchasing a car. Lightweight material contributes for increasing car efficiency as steel development for automotive material leads to “Formable-Weldable High Strength Steel” that possesses high strength without sacrificing its ductility and weld ability. During this research study indicates the difficulties in production of automotive materials through TRIP steel, as challenged by a Dual Phase Steel produced from an ordinary commercial C-Mn steel through an ”Intercritical Annealing” route. Intercritical annealing had done at 740°C with variations in soaking time are followed by fast cooling in water. The Ferrite that surrounded by Martensite caused a significant impact to increase the strength of Dual Phase Steel, from 523.36 MPa to 1 GPa, with TEL 0.25 and UEL value of 0.2. By increasing the strength of Dual Phase Steel will impact the lightweight of the body frame of the car. With the higher the strength of Dual Phase Steel then the body of the car will improve lightweight

Effects of DP steel microstructure on the disappearance of discontinuous yielding

Although in terms of quality is not as high as TRIP steel, DP steel has been developed as an option to meet the minimum standard industrial requirement for automotive. Steel development for automotive material leads to posses high strength without suffering its ductility and weld ability, in addition there is no appearance of discontinuous yielding that cause stretcher strain marking. The change of micro structure as a result of the intercritical annealing process not only increases the strength of Dual Phase Steel, but also eliminates the discontinuous yielding. The phenomenon of discontinuous yielding is no longer appear in Dual Phase Steel which heating time on intercritical annealing process more than 1 minute, the minimum time is equal to the disappearance of discontinuous yielding. The phenomenon of upper yield point and discontinuous yielding on carbon steel is strongly influenced by the magnitude of the stress acting on the Ferrite phase to move the dislocation of the pinned state by the interstitial atom. From the recent works gives the result that the disappearance of discontinuous yielding in Dual Phase Steel resulting from the intercritical annealing process makes Dual Phase Steel very suitable as an automotive material

Smart City Serious Game Based on Features Selection

In general, the smart city concept integrates ICT devices to collect various types of data related to urban life. The data will be used to manage and improve assets and operations in the city. In determining a smart city, there are eight key aspects (features) as a consideration. However, implementing eight smart city features will require many resources, including time, cost, and human resources. Therefore, this paper aims to develop a scenario and method of features and smart city parameters establishment in a serious game. This game consists of visualization, storyline, and gameplay as a learning platform to increase players’ understanding of the smart city concepts. The development was started by collecting feature data of each city. The collected data will be discovered for the relationship between its features using differential equations. Then, data processing results will be classified and used as a basis for serious games. This study’s product is an easy-to-use game that can simulate planning and constructing a smart city. This game is intended for the city government or the mayor as a critical role in city development. It will ease the user to understand the concept of the smart city based on the city characteristics. Furthermore, this serious game will provide feedback and recommendations on aspects that need to be improved in the city. It can be basic knowledge to make an actual decision and policies in smart city development