Defect structures and structural relationships of the Z and T phases in an Al-Li-Cu-Mg alloy
- Inst. of Metal Research, Shenyang (China). Lab. of Atomic Imaging of Solids Univ. of Science and Technology, Beijing (China). State Key Lab. of Advanced Materials
- Univ. of Science and Technology, Beijing (China). State Key Lab. of Advanced materials
Al-Li alloys have stirred a lot of interest because of their high mechanical properties/density ratio for aerospace application. Recently, some intermetallic compounds in the vicinity of Al[sub 0.6] (Cu,Zn)[sub 0.1](Li[sub 9]Mg)[sub 0.3], namely the so-called R,Z,C and [tau] phases, have been detected and studied in detail, due to their intimate structural relationship to the T[sub 2] quasicrystal phase. These compounds (including of T phase) and T[sub 2] consist of similar structural units, such as blocks of icosahedra, dodecahedra and tricontahedral, that makes them often intergrow with each other Shiflet, Yang et al. interpreted six types of shear planes in the R phase, implying a structural link between R and T[sub 2] phases, due to transformation behavior from T[sub 2] to R phase. Zhou et al. observed a well defined crystallographic orientation relationship between the R and Z phases possessing the same basic building units in the Al-Li-Cu alloy. In spite of a large amount of work in Al-Li system, little study has gone to the structural defects of other phases and links among them. This paper present the defect structures of the hexagonal Z and the f.c.c. T phases, as well as two types of structural orientation relationships between them.
- OSTI ID:
- 5363434
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Vol. 30:1; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
Similar Records
{alpha}-AlMnSi phase to a bcc structure by Xe{sup +} ion-beam irradiation
Precipitates in a quasicrystal-strengthened Al–Mn–Be–Cu alloy