|
 |
|||||||||||||
| Home>Research>MC2-Crystalline Materials under Stress>Alloy microstructure>Aeronautic | ||||||||||||||
New approach of structural work-hardening in aeronautic alloys |
| Armand Coujou, Joël Douin, Florence-Pettinari-Sturmel, Bouzid Kedjar (12/07-05/09), Vanessa Vidal (12/06-06/07) |
| The aeronautic industry aims at developing new metallic alloys combining a good mechanical strength and a low density. Structural work hardening is one of the most effective methods to optimize the applications where the need to reduce the weight of the structures imposes significant improvements in mechanical properties. The exceptionally good structural work-hardening of last generation aluminium alloys and steels find their origin in nanometric precipitation. To understand the macroscopic mechanical properties of these alloys, fine analysis are undergone, at a scale that requires up-to-date characterization techniques. |
Figure 1: HREM micrograph of a nanoscopic carbide in a martensitic steel. |
| Our study allows not only to determine the nature, size and volume fraction of the nano-preciptates, but also the distance between them or their eventual orientation relationship with the matrix, as well as their strength and the stress field they generate in the matrix. |
|
Research topics: - Stress
field / precipitation relationship in steels and aluminium alloys. |
|
| Main coworkers |
|
Contracts: - ANR-BLANC- 06 CONTRAintes et PRECIpitation - ANR-RNMP-05 Aciers MARtensitiques Alliés de nouvelle
GEnération |
|
Key-words: |
|
