End-User Driven Process Design for Steels with Extreme Properties (ExtremeSteels)

Press hardening, a Swedish invention, has shown an exponential industrial growth and has become a global technology. The main driving force for the increased use of press hardened components is care for the environment by the use of ultra-high strength press hardened components. Lighter vehicle structures aiming for lesser emissions have been designed with maintained or increased passenger safety. Since the introduction of press hardened structural components, the material used for ultra high strength components is a boron alloyed steel, 22MnB5.

SLM: ed stainless steels for space applications (SeSSA)

Microstructure Characterization and mechanical properties of Stainless Steel Built by SLM process

Effect of surface phenomenon and defects on mechanical properties in AM of Ti-6Al-4V (SUDDEN)

This is a project in close collaboration with GKN aerospace aimed at investigating the feasibility of using powder bed AM components in fatigue critical applications. Powder feedstock and post-build processing (HIP and Chemical milling) and how these impact the fatigue life will be investigated. Finally, by accounting for these effects how can modeling be implemented in GKNs' industrial product development.

Identifying cracking causes and process improvement for continuous casting of micro-alloyed steels

Continuous casting (CC) is cost and energy efficient method to mass produce semi-finished metal products with consistent quality and excellent mechanical properties; therefore, it’s the most widely used process to cast metals and alloys. Nevertheless, steelmakers often experience problems with surface defects such as transverse corner cracks that are highly detrimental to productivity. These cracks are difficult to detect since they may be covered with scale or appear in the product’s sub-surface. As a consequence, these defects have to be removed by scarfing and grinding the slabs. These cracks may, if not detected, even appear in the plate surface, which will be rejected resulting in a loss of yield and energy. Thus, an accurate description of the cracks formation is of great interest to steelmakers worldwide.

Increasing phase transformation rate in advanced high strength steel applications

This work has focused on study of the Quenching and Partitioning (Q&P) process by assessing involved mechanisms, microstructure and mechanical properties, aiming at an acceleration of phase transformation rate to shorten the process time in addition to improving properties in service to the industry.

HIPEBA

In the appended films is the final results of the HIPEBA project expressed in a good way.
The high strength steel, from SSAB, applied to the road restraint system can manage to stop the crash from a heavy truck in an excellent way.
In addition can the new design of the road restraint system also give a good reaction if it is hit by a small sized car, and the vehicle will not bump out back to the road with a too high angle.

Microstructure and mechanical properties of Ti-6Al-4V for space applications

This project will investigate the use of additive manufacturing to produce next generation Ti components for the Ariane 6 rocket. The scope is to characterize and validate the material parameters for additive manufactured Ti-6Al-4V.

To achieve knowledge and understanding of material behavior, the microstructure is characterized and correlated with the mechanical properties. Hydrogen embrittlement is also investigated.

Degradation Mechanisms of Heat Resistant Steel at Elevated Temperatures: In an Iron Ore Pelletizing

Oxidation and Alpha-Case Phenomena in Titanium Alloys used in the Aerospace Industry

Environmental Assisted Cracking of Titanium Alloys in contact with Copper

Titanium alloys were for a time believed to be highly resistant to environmental assisted cracking compared with other engineering materials because of their ability to form a protective oxide film on the surface. The corrosion resistance can still be considered as high but when it was originally defined to ensure functionality of fracture-critical components, unique conditions that promote cracking were discovered.

Characterization and Validation of Material Parameters of Metal Deposited and Welded Ti-6Al-4V

Titanium alloys are frequently used in aerospace applications due to their superior strength to weight ratio. The most widely used titanium alloy is Ti-6Al-4V, it was invented in the 1950’s and has since then, apart from in aerospace components, been used in medical devices and prostheses because of its biocompability and corrosion resistance. In this project, promising manufacturing methods for producing the next generation of turbine outlet manifold in titanium alloy is investigated. The driving force behind the project is to save weight of Vinci, the upper stage engine of Ariane 5, in which the turbine outlet manifold is located. In addition to low weight, reliable functionality is of great importance, particularly when the final application will transport valuable cargo. To ensure that all requirements are fulfilled, knowledge and understanding of materials are needed all the way throughout the manufacturing process.

Microstructure and mechanical properties of Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V: Influence of H, O&B

Ceramic Synthesis

In this Division we investigate the process of ceramic production from the synthesis of novel starting powders through to densificaiton and characterisation of material properties.

Our current research interests are in the following materials:

Yttria (Y2O3)
- nano-powders formed by wet chemical methods
- hot isostatic pressing (HIP) for transparent component formation lasers and sensors
- doping for functional properties

MAX-phases (Ti3SiC2, Ti2AlN)
- synthesis using both traditional methods and wet chemical methods
- vaccum densification and hgh temperature stability

Novel MAX phases (CrAlN)

Ceramic Coatings

Ceramic coatings are widely used in industry eg. as thermal barriers on jet engine components, wear and corrosion barriers in industrial plants, semiconductors, and electrical and optical sensors.

Modern deposition processes allow us to produce films with controlled microstructures that give new and novel properties, such as nano-scale multilayers with ultra-high hardness.

The focus of research in this field is on characterising the phase formation, phase transformations, and residual stresses in ceramic films in order to make new and improved materials.

High Performance Steels

Steels have been produced for centuries and it is the most commonly used engineering material. Steel research is however still an active field, due to the importance of steels in the society. The research at the division is mainly focused on improving high performance steels, by investigating the relationship between fabrication, structure and properties.

Facilities and expertise for heat treatment, joining, mechanical testing, advanced characterization, and computer modeling exists within the high performance steel group.