An electron-microscopy study of dislocation structures in fatigued Cu-Zn-Al shape-memory alloys
- 1 April 1987
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 55 (4), 445-461
- https://doi.org/10.1080/01418618708209908
Abstract
Samples of Cu-Zn-Al shape-memory alloys have been fatigued by stress cycling through the martensitic transformation. The structure of the dislocations formed after fatigue was investigated by transmission electron microscopy. The dislocations are found to be accumulated in bands closely parallel to those of either the habit plane or the basal plane of the induced variant of martensite. The Burgers vectors of the dislocations are analysed by a computer-simulation technique. Most of the dislocations are of mixed character (u = , b = ). Among these dislocations, those gliding on the (101) plane, which is transformed into the basal plane of the induced martensite, are clearly predominant. Several proposed models for the formation of dislocations during the fatigue testing are critically reviewed.Keywords
This publication has 29 references indexed in Scilit:
- Strain Field Observation and Lattice Stability at the Tip of Thermoelastic Cu-Zn-Al Martensite PlatesPhysica Status Solidi (a), 1985
- Characterization of dislocations formed cyclical ß1⇌ß1′ martensitic transformations in CuZnAl alloysScripta Metallurgica, 1985
- Low temperature fatigue in CuZnAl single crystalsScripta Metallurgica, 1985
- A quantitative study of stable dislocations in the β1-phase of Cu-Zn-Al alloysPhysica Status Solidi (a), 1985
- On the nature of various stacking defects in 18R martensite in Cu-Al alloys A study by high resolution electron microscopyPhysica Status Solidi (a), 1984
- The high resolution electron microscopy of stacking defects in Cu–Zn–Al shape memory alloyJournal of Microscopy, 1983
- STUDY OF DISLOCATIONS IN CYCLICALLY TRANSFORMED β - PHASE IN Cu-Zn-Al ALLOYSLe Journal de Physique Colloques, 1982
- ON SOME LESSER KNOWN PLANAR DEFECTS IN β'1 Cu-Zn-Al MARTENSITELe Journal de Physique Colloques, 1982
- Fatigue life of CuZnAl alloysScripta Metallurgica, 1979
- On the stability of the martensite in β-CuZn alloysScripta Metallurgica, 1974