Publications de Annick Pauline Baur

On the chevron morphology of surface martensite

Roland Logé, Cyril Cayron, Annick Pauline Baur

It is established that the annealing twin boundaries of austenite act as nucleation sites for the martensitic transformation. In the present study, we observe that in surface martensite the transformation only takes place for twin boundaries that are appro ...

2019

Variant selection in martensitic steels

Annick Pauline Baur

The martensitic phase transformation in steel is one of the most famous solid state transformation because of its contribution in the development of the modern industry. This transformation from a face-centered cubic (FCC) high temperature phase, called th ...

EPFL2019

Intricate morphologies of laths and blocks in low-carbon martensitic steels

Roland Logé, Cyril Cayron, Annick Pauline Baur

2018

Variant Selection in Fe-20Ni-1.8C under Bending

Roland Logé, Cyril Cayron, Annick Pauline Baur

Variant selection is commonly observed in martensitic steels when a stress is applied to the material during transformation. Classically, the selection phenomenon is modelled considering the work of the shape strain in the applied stress field. This shape ...

2018

Variant selection in surface martensite

Roland Logé, Cyril Cayron, Annick Pauline Baur

A significant variant selection is reported in isothermal martensite formed on the surface of an Fe-30% Ni sample. The selection phenomenon is modelled using different descriptions of the martensitic phase transformation. In particular, matrices based on t ...

International Union of Crystallography2017

{225} habit planes in martensitic steels: from the PTMC to a continuous model

Roland Logé, Cyril Cayron, Annick Pauline Baur

Fine twinned microstructures with {225}γ habit planes are commonly observed in martensitic steels. The present study shows that an equibalanced combination of twin-related variants associated to the Kurdjumov-Sachs orientation relationship is equivalent to ...

Nature Research2017