Fachbereich 11 - Physik
Institut für Materialphysik
Strengthening and Nanostructure of Metals and Alloys

Strengthening of an L1₂-long range ordered intermetallic by disordered precpitates

Strengthening of an intermetallic by disordered coherent shearable precipitates has been investigated by:

1. measuring the critical resolved shear strength of single crystals of such a material as a function of the volume fraction and the radius of disordered precipitates,
2. computer simulating the glide of dislocations in such a material,
3. stretching thin foils of such a material inside a transmission electron microscope and observing the glide of dislocations.

Drittmittelgeber:

Deutsche Forschungsgemeinschaft

Beteiligte Wissenschaftler:

Dr. D. Baither, Dr. T. Pretorius, Prof. a. D. Dr. E. Nembach

Veröffentlichungen:

Pretorius, T., E. Nembach: Strengthening of an L1₂-ordered g'-intermetallic by disordered g-particles. Part I: Computer simulations, Acta mater., 49, 1971, 2001

Pretorius, T., D. Baither, E. Nembach: Strengthening of an L1₂-ordered g'-intermetallic by disordered g-particles. Part II: Measurements of the CRSS and TEM observations of dislocation processes in Ni69Co9Al18Ti4, Acta mater., 49, 1981, 2001

Baither, D., T. Pretorius, E. Nembach: In situ straining in the transmission electron microscope of an L1₂-ordered g'-intermetallic strengthened by disordered g-particles, Acta Mater., 51 , 1229, 2003