Master thesis – Stress relief method evaluation i Luleå

Scania genomgår nu en transformation från att vara en leverantör av lastbilar, bussar och motorer till en leverantör av kompletta och hållbara transportlösningar.

Ingress

Scania Ferruform AB is a wholly owned subsidiary of Scania. Our mission is to strengthen Scania’s competitiveness with today’s and future products, through industry-leading skills, efficient processes and cross-functional work. We have daily deliveries of rear axles, side- and cross beams along with other frame components to Scania’s chassis assemblies in Södertälje, Zwolle and Angers. With over 500 employees we are one of Luleå’s largest manufacturing industries. We offer a master thesis in the engineering department which is a great entry path into Scania and build relationships for the future.

Background

Scania Ferruform has previously investigated alternative methods for removing unwanted residual stresses in the rear axles after they have been welded. Today, all rear axles pass through an oven for stress relaxation annealing, but Scania Ferruform is interested in the so-called BS (Bend Straightening) method. In order evaluate this concept, these two methods need to be compared from a fatigue strength viewpoint, to ensure the quality of the product.

Assignment

Determine what areas have the highest levels of residual stresses and where the failure nodes are on today’s rear axles. Construct and run small scale experiments (or simulations) in order to characterise how the variables of the BS method impact the resulting fatigue strength. Based on this information formulate a recommendation for how the BS process should be performed in order to increase the fatigue strength of the axles.

Profile

Education: Material Science & engineering, Mechanical Engineering or similar oriented master programmes.

Number of students: 1-2

Start date: January 2019, estimated time needed is 20 weeks.

Contacts persons and supervisors:

Daniel Olovsson, Industrial Engineer, +46 (0)920-72604, .

Magnus Nyberg, Specialist Industrial Engineer, +46 (0)920-76640, .