TY - JOUR
T1 - Transmission electron microscopy observations of fatigue deformation in a Fe-19 Cr-4 Ni-2 AI alloy
AU - Ho, New Jin
AU - Tjong, Sie-Chin
AU - Chang, Yu-Chia
PY - 1990/1
Y1 - 1990/1
N2 - A ferritic Fe-19 Cr-4 Ni-2 Al alloy was cyclically deformed at room temperature. Transmission electron microscopy was employed to investigate the dislocation structures developed in the solution-treated and aged specimens. For the solution-treated alloy deformed at a low strain amplitude (0.3%), TEM observations revealed the presence of screw dislocations with the two slip systems. Extended wall and labyrinth structures were observed in the solution-treated Fe-19 Cr-4 Ni-2 Al alloy after cycling at intermediate strains. On the other hand, the microstructural examination showed that paired dislocations and concentrated slip bands were developed in the aged alloy cycled at a total amplitude of 0.4%. With further cycling of the aged alloy at a higher strain amplitude (1%) only loop patches were observed.
AB - A ferritic Fe-19 Cr-4 Ni-2 Al alloy was cyclically deformed at room temperature. Transmission electron microscopy was employed to investigate the dislocation structures developed in the solution-treated and aged specimens. For the solution-treated alloy deformed at a low strain amplitude (0.3%), TEM observations revealed the presence of screw dislocations with the two slip systems. Extended wall and labyrinth structures were observed in the solution-treated Fe-19 Cr-4 Ni-2 Al alloy after cycling at intermediate strains. On the other hand, the microstructural examination showed that paired dislocations and concentrated slip bands were developed in the aged alloy cycled at a total amplitude of 0.4%. With further cycling of the aged alloy at a higher strain amplitude (1%) only loop patches were observed.
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U2 - 10.1515/ijmr-1990-810102
DO - 10.1515/ijmr-1990-810102
M3 - RGC 22 - Publication in policy or professional journal
SN - 0044-3093
VL - 81
SP - 8
EP - 14
JO - Zeitschrift für Metallkunde/Materials Research and Advanced Techniques
JF - Zeitschrift für Metallkunde/Materials Research and Advanced Techniques
IS - 1
ER -