Browsing Engineering (Faculty of) by Subject "Microstructure"
Now showing items 1-20 of 24
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Characterization and microstructure-based modeling of spot weld failure in hot stamped steel
(University of Waterloo, 2022-02-08)The performance of automotive safety components in a crash event depends on the mechanical properties of the sheet metal as well as the failure behavior of the spot welds that are used for sheet metal assembly. Unlike many ... -
Characterization and Simulation of the Microstructure of Additively Manufactured Hastelloy X Parts with Columnar Grain Structure
(University of Waterloo, 2021-05-21)One of the well-known AM techniques is laser powder-bed fusion (LPBF), which enables engineers to benefit from the concept of “design freedom” while designing complex geometries compared to other conventional methods. This ... -
Characterization of the Quasi-Static and Fatigue Behavior of Forged AZ31B Magnesium Alloy
(University of Waterloo, 2018-04-17)Light-weighting is being aggressively targeted by automotive manufacturers as a method to reduce emissions. Magnesium (Mg) alloys due to their low density and high specific strength have therefore gained significant interest ... -
Control of Microstructure in Laser Additive Manufacturing
(University of Waterloo, 2014-09-22)Since its arrival in the late 1980’s, Laser Additive Manufacturing (LAM) has come a long way to establish itself as one of the most advanced versatile manufacturing technologies in the 21st century. LAM implies a novel ... -
Dendritic coarsening model for rapid solidification of Ni-superalloy via electrospark deposition
(Elsevier, 2018-08-01)Control of splat thickness in an electrospark deposition (ESD) process can be used to improve the mechanical properties of deposited Inconel 718. The lower cooling rates of thicker deposition splats obtained through higher ... -
Development and Influence of Fusion Boundary Microstructure on Resistance Spot Welds in 3rd Generation Advanced High Strength Steels
(University of Waterloo, 2024-05-08)The use of advanced high-strength steels (AHSS) is one of the design solutions for making new-generation auto bodies to build economical and environmentally friendly structures without compromising vehicle safety. Among ... -
Effect of Alloy Composition on the Hot Deformation Behavior, Extrudability and Mechanical Properties of AA6XXX Aluminum Alloys
(University of Waterloo, 2017-08-02)As automotive companies adjust to stricter environmental legislations, there is increased interest in the application of high specific strength alloys such as the AA6xxx aluminum alloys. In the near term, light weighting ... -
Effect of Bridge Geometry on Seam Weld Microstructures in AA6xxx Aluminum Porthole Die Extrusions
(University of Waterloo, 2020-05-27)A series of porthole die extrusion trials were conducted with AA6xxx aluminum alloys to understand the influence of die geometry (bridge shape and welding chamber height), extrusion process parameters (ram speed) on the ... -
Effect of forging on the low cycle fatigue behavior of cast AZ31B Alloy
(Elsevier, 2017-08-26)The effect of forging on the low cycle fatigue (LCF) behavior of cast AZ31B was investigated. The forging process was conducted at a temperature of 450°C and speed of 390mm/min. Fully reversed (Rε=-1) strain controlled ... -
Effects of graphene nano-platelets (GNPs) on the microstructural characteristics and textural development of an Al-Mg alloy during friction-stir processing
(Elsevier, 2018-02-15)The aim of this research is to characterize the unique microstructural features of Al-matrix nanocomposites reinforced by graphene nano-platelets (GNPs), fabricated by multi-pass friction-stir processing (FSP). During this ... -
Effects of post-processing on the thermomechanical fatigue properties of laser modified NiTi
(Elsevier, 2019-01-01)The multifunctional capabilities needed for advanced shape memory alloys (SMA) actuators has been shown to be achievable by locally tuning the properties through laser processing. Before the wide-spread use of these SMAs ... -
Effects of Processing Parameters on Friction Stir Welded Lap Joints of AA7075-T6 and AA6022-T4
(University of Waterloo, 2016-10-25)Friction stir welding (FSW) is a solid-state welding process that has a number of advantages over traditional fusion welding techniques when attempting to join aluminum or dissimilar material workpieces. It is expected to ... -
Fracture Mechanisms in Resistance Spot Weld of Magnesium Alloys
(University of Waterloo, 2015-06-19)The automotive industry is adopting the application of magnesium and magnesium alloys in order to produce light-weight auto-body structures. Therefore, it is essential to evaluate the load bearing capability of these metals ... -
Investigation of Liquid-Metal-Embrittlement Crack-path: Role of Grain Boundaries and Responsible Mechanism
(University of Waterloo, 2020-07-24)Liquid metal embrittlement (LME) has been reported in many structural materials, including steel, aluminum, nickel during hot working processes e.g. welding, brazing, heattreatment, leading to abrupt failure. In many of ... -
Laser Brazing of Magnesium to Steel Sheet
(University of Waterloo, 2013-10-24)The ability to effectively join magnesium alloys to steel will facilitate increased application and use of Mg alloys in the automotive and aerospace industries where joining Mg alloys to steel in order to achieve light ... -
Laser Welding of Medium-Manganese Steel
(University of Waterloo, 2016-08-31)Medium-Manganese (MMn) third generation advanced high strength steel (AHSS) was joined using laser welding. The effects of rapid heating and cooling thermal cycles imposed by laser welding on MMn steel was investigated. ... -
Liquid metal embrittlement in laser lap joining of TWIP and medium-manganese TRIP steel: The role of stress and grain boundaries
(Elsevier, 2018-11-01)High-Manganese austenite-containing steels with superior combination of strength and ductility have shown potential for enhancement of passenger safety and body-in-white (BIW) weight reduction. Even though Zn-coated ... -
Magnetic Pulse Welding of Mg Sheet
(University of Waterloo, 2011-08-31)Because of its low density and high strength, magnesium (Mg) and its alloys are being sought after in the automotive industry for structural applications. Although many road-going cars today contain cast Mg parts, in the ... -
Mathematical Modelling of the Material Flow and Microstructural Evolution During the Extrusion of AA3003 Aluminum Alloy
(University of Waterloo, 2013-09-25)A comprehensive mathematical model of the hot extrusion process for aluminum alloys has been developed and validated. The model is capable of predicting the material flow behaviour and microstructure evolution that occurs ... -
On the experimental design of the material microstructures
(University of Waterloo, 2014-05-05)The design techniques of the components on the macro level are established in the scientific community, however are far behind from the real material performance limits. To obtain those limits, the deeper understanding of ...