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Sensitivity of crack growth behavior to corrosive environment


Project Description

The project, "Sensitivity of crack growth behavior to corrosive environment" is part of project FATCO 2019: "Fatigue and corrosion-fatigue behavior of 13Cr-4Ni steels and additively manufactured alloys for application to large-size components such as hydraulic turbines and machinery."

__Your project: Sensitivity of crack growth behavior to corrosive environment__

This doctoral project is at Polytechnique Montréal under the supervision of Professors Myriam Brochu and Janine Mauzeroll and in collaboration with researchers in our partner organizations, including Denis Thibault, Stefano Beretta, and Jean-Philippe Harvey. The doctoral project is centered on evaluating mechanical fatigue crack propagation in corrosive environments emulating conditions observed near a turbine belonging to Hydro-Quebec. This student will be responsible for fatigue and microstructural analysis experiments. The student will have scientific creative freedom beyond the “industrial objectives.”

Corrosion can have a significant influence on the crack growth threshold and this has never been studied specifically in an environment and under loading conditions representative of Hydro-Quebec’s hydraulic turbines. The objective of this project is to quantify the influence of corrosive media on the resistance to crack growth of 415 stainless steel in comparison with results obtained from mild steel. The domain of interest is the near crack growth threshold.

A constant ΔK procedure will be used and several loading frequencies will be tested to identify the conditions showing a wider variety of crack growth behaviors.

The experimental strategy proposed consists of propagating a crack at constant ΔK. In a homogeneous material and environment, a constant propagation rate can be achieved. Based on this, environmental and loading parameters will be modified during the test to study their influence on the crack growth rate.

This task will be performed with the help of project members having expertise in crack and corrosion behavior.

__FATCO 2019, an international effort__

Join our efforts under the umbrella of a large, multidisciplinary, international project entitled "Fatigue and corrosion-fatigue behavior of 13Cr-4Ni steels and additively manufactured alloys for application to large-size components such as hydraulic turbines and machinery," abbreviated FATCO 2019.

The global objective of FATCO 2019 is to develop advanced understanding of corrosion and corrosion-fatigue of Fe-based materials in order to generate predictive methods and metallurgical specifications better adapted to corrosion-fatigue. These methods will aid in maintaining cost-effective hydroelectric infrastructure in Quebec and in the machinery developed by SACMI.

FATCO 2019 involves a number of industrial and academic partners: the Hydro-Québec Research Institute (IREQ), the multinational group SACMI, the Consortium de recherche et d’innovation en transformation métallique (CRITM), the Natural Sciences and Engineering Research Council of Canada (NSERC), Polytechnique Montréal, McGill University, the École de technologie supérieure, the Centre de métallurgie du Québec (CMQ), Politecnico di Milano, and the Università degli Studi di Ferrara.

As a member of the project, you will collaborate with professional researchers and technicians working in our partner companies, institutes and universities. Under the supervision of your advisors, you will learn to lead a research project in its entirety: from conception through to project planning, experimental execution, analysis, and production of practical scientific results. The project is full-time and includes substantial financial aid (26 250$/year for PhD students) with the possibility of additional scholarships.

__Conditions and application__

Profile: Engineering diploma or B.Sc. in materials, mechanical engineering, chemistry, physics or a related field. Able to communicate in English. Polytechnique Montreal has an equal access employment program and encourages women, members of visible and ethnic minorities, Aboriginal people and persons with disabilities to apply.

Candidacy deadline: Prior to April 2019.
Start date: Immediately.
Duration: 3 to 5 years.

If interested, please supply the following information: the project requested; a one-page letter introducing your expertise, experience, and professional motivation; your resume; all relevant university transcripts; and an example of your written work, such as your best publication, if any.

Funding Notes

The project is full-time and includes substantial financial aid (26 250$/year for PhD students) with the possibility of additional scholarships.

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