Utskrift från Malmö högskolas webbplats www.mah.se

Multiscale modelling of hydrogen induced fracture in hydride forming metals

Contact person: Christina Bjerkén
Responsible: Christina Bjerkén
Co-workers: Gästprofessor Ali Massih, Dr Jakob Blomqvist and Professor Per Ståhle
Partner: Studsvik Nuclear AB och Volvo Aero Corp
Funding: KK-stiftelsen / The Knowledge Foundation (KKS)
Timeframe: 2009-01-01 -- 2011-12-31
Faculty/Department: School of Technology

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Short description

The synergetic in hydride precipitation, hydrogen diffusion and hydride-induced crack propagation in titanium and zirconium alloys will be studied using current computational approaches in materials science, a mesoscale phase field method and atomic scale approaches, in light of data. The effect of hydrogen content, specimen temperature, stresses, hydride shape and orientaion on crack propagation will be studied. The multiscale approach allows isolating the individuel effects liable for microstructure evolution plus crack growth. The method will clarify problems that may occur during fabrication and/or service regarding hydride cracking.

Publications

- Massih AR (2009) Diffusion-controlled phase growth on dislocations, Philosophical Magazine, 89(33): 3075-3086; also in ArXiv e-prints (11 February, 2009) arXiv:0902.1841v1 [cond-mat.mtrl-sci]
- Massih AR, Jernkvist LO (2009) Stress orientation of second-phase in alloys: Hydrides in zirconium alloys, Computational Materials Science 46:1091–1097, ibid 48: 212 (2010); also in ArXiv e-prints (1 July, 2009) arXiv:0907.0131v1 [cond-mat.mtrl-sci]
- Massih AR (2011) Phase Transformation Near Dislocations and Cracks, Solid State Phenomena,172-174:384-389
- Massih AR (2011) Second-phase nucleation on an edge dislocation, arXiv:1108.3935v1 [cond-mat.mtrl-sci] 19 Aug 2011
- Bjerkén C, Massih A (2011) Nucleation of second-phase near elastic defects in crystalline solids, Accepted for publication in Proc. Conf. Materials Science and Technology, Oct 2011,Columbus, Ohio
- Blomqvist J, Olofsson J, Alvarez A-M, Bjerkén C (2011) Structure and Thermodynamical Properties of Zirconium Hydrides from First-Principle, in Proc15th Int Conf Environmental degradation of Materials in Nuclear Power Systems-Water Reactors, 7-11 Aug, 2011, Colorado Springs

Senast uppdaterad av Magnus Jando