Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion

• Published in: Philosophical magazine (Abingdon, England) Vol. 91; no. 25; pp. 3307 - 3326
• Main Authors: An, X.H., Lin, Q.Y., Wu, S.D., Zhang, Z.F., Figueiredo, R.B., Gao, N., Langdon, T.G.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis Group 01.09.2011; Taylor & Francis
• Subjects: Alloys; Condensed matter: structure, mechanical and thermal properties; copper; COPPER ALLOYS (40 TO 99.3 CU); Copper base alloys; Cu-Al alloys; Defects and impurities in crystals; microstructure; Deformation and plasticity (including yield, ductility, and superplasticity); Evolution; Exact sciences and technology; HARDNESS; HIGH PRESSURE; high-pressure torsion; Homogeneity; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Microhardness; Microstructure; MICROSTRUCTURES; Physics; STACKING FAULT ENERGY; STACKING FAULTS; Stacking faults and other planar or extended defects; Structure of solids and liquids; crystallography; Torsion; Grain size; Temperature dependence; Crystal twin; Crystal defects; Stacking faults; Mechanical properties; Microhardness; Fragmentation; Quantity ratio; Aluminium alloys; High pressure torsion; Copper alloys; Microstructure; Recovery (properties)

Disks of pure Cu and several Cu-Al alloys were processed by high-pressure torsion (HPT) at room temperature through different numbers of turns to systematically investigate the influence of the stacking fault energy (SFE) on the evolution of microstructural homogeneity. The results show there is ini...