TY - GEN
T1 - Influence of retrogression and reageing on the fracture toughness of 7010
AU - Robinson, J. S.
AU - Newcomb, S. B.
PY - 2001
Y1 - 2001
N2 - The Al-Zn-Mg-Cu aluminium alloy, 7010, is a precipitation hardenable, plate and forging material, which is widely used in Europe for strength critical aerospace structural applications. The alloy is known to respond well to retrogression and reaging (RRA) thermal treatments: retrogressing heat-treated material at 200°C and then reageing for 24 hours at 120°C can achieve tensile properties comparable to a T6 type condition as well as excellent stress corrosion cracking resistance. The high strengths associated with optimised RRA conditions tend to result in relatively low levels of plane strain fracture toughness. Varying the retrogression time and temperature strongly influences the fracture toughness and does so to a degree that is greater than would be expected from the change in tensile properties alone. The fracture toughness and tensile properties of 7010 are reported and their dependence on retrogression time and temperature are described. A correlation has been made between such properties and the alloy microstructure, as characterised using transmission electron microscopy, and the results are discussed in the light of this relationship.
AB - The Al-Zn-Mg-Cu aluminium alloy, 7010, is a precipitation hardenable, plate and forging material, which is widely used in Europe for strength critical aerospace structural applications. The alloy is known to respond well to retrogression and reaging (RRA) thermal treatments: retrogressing heat-treated material at 200°C and then reageing for 24 hours at 120°C can achieve tensile properties comparable to a T6 type condition as well as excellent stress corrosion cracking resistance. The high strengths associated with optimised RRA conditions tend to result in relatively low levels of plane strain fracture toughness. Varying the retrogression time and temperature strongly influences the fracture toughness and does so to a degree that is greater than would be expected from the change in tensile properties alone. The fracture toughness and tensile properties of 7010 are reported and their dependence on retrogression time and temperature are described. A correlation has been made between such properties and the alloy microstructure, as characterised using transmission electron microscopy, and the results are discussed in the light of this relationship.
UR - http://www.scopus.com/inward/record.url?scp=0141844639&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0141844639
SN - 0871707470
T3 - Advances in the Metallurgy of Aluminum Alloys
SP - 261
EP - 270
BT - Advances in the Metallurgy of Aluminum Alloys
A2 - Tiyakioglu, M.
A2 - Tiyakioglu, M.
T2 - Proceedings from Materials Solutions Conference 2001
Y2 - 5 November 2001 through 8 November 2001
ER -