Comparison of Cu and Ti-52A1 in creep at the same homologous temperature and minimum creep rate

0177794 - UFM-A 20013317 RIV GB eng J - Článek v odborném periodiku
Orlová, Alena
Comparison of Cu and Ti-52A1 in creep at the same homologous temperature and minimum creep rate.
Intermetallics. Roč. 9, - (2001), s. 529-534. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA ČR GA106/98/1369; GA AV ČR IBS2041001
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: titanium aluminides based on TiAl * creep * dislocation geometry and arrangement
Kód oboru RIV: JG - Hutnictví, kovové materiály
Impakt faktor: 1.239, rok: 2001

The present work discusses conditions of comparable creep behaviour of a metal (copper) and an intermetallic compound (Ti52Al). It compares three "similar" creep curves obtained at the same homologous temperature and showing the same minimum creep rate. In both materials, creep starts with an initial stage during which the creep rate decreases to its minimum. In the stage after the minimum, a remarkable difference in behaviour appears-a rapid tertiary stage in copper and a stage of a slowly increasing creep rate in the intermetallic alloy. Corresponding qualitative and quantitative differences in the dislocation structure and substructure resulting from pre-fracture creep were investigated by means of transmission electron microscopy.
Trvalý link: http://hdl.handle.net/11104/0074702