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Effect of hydrogen release on intergranular crack propagation mechanisms


Project Description

The project, "Effect of hydrogen release on intergranular crack propagation mechanisms" 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: Effect of hydrogen release on intergranular crack propagation mechanisms__

This masters 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 Robert Lacasse. The masters project is centered on microstructural evaluation (XRD, SEM, CT, …) of steel samples in order to establish a useful link between the structure/chemistry of the steels involved and crack propagation by mechanical fatigue in these materials.

Previous studies performed on martensitic stainless steel containing from 2-25% reformed austenite showed that fatigue cracks propagate with mixed mechanisms showing a combination of transgranular and intergranular facets when analyzing the fracture surface. Some results not aiming to study specifically this subject showed that the intergranular propagation occupies a larger surface proportion on fractography in ΔK ranging from 8 to 15 MPa.m0.5, when specimens are tested at 20 Hz.

Intergranular crack paths are often related to hydrogen embrittlement. The goal of this masters project is study that hypothesis. This will deepen our understanding of the synergistic effects between corrosion and fatigue damage.

__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 (22 250$/year for masters 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 French and 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: Oct. 2019.
Start date: Jan. 2020.
Duration: 1.5 to 2 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 (22 250$/year for masters students) with the possibility of additional scholarships.

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