TEM observation of precipitates in a 7050 alloy after RRA treatment

Hangkong Cailiao Xuebao/Journal of Aeronautical Materials

Volumn 20, Issue 4, 2000, Pages 6-7

  Gu, Yi Jie ^a   Li, Yong Xia ^a   Zhang, Yong Gang ^a   Huang, Zheng ^a   Chen, Chang Qi ^a  

^a BEIHANG UNIVERSITY   (China)

Author keywords

7050 alloy; Retrogression; Retrogression and reaging

Indexed keywords

AGING OF MATERIALS; HARDNESS; PRECIPITATION (CHEMICAL); THERMAL EFFECTS; TRANSMISSION ELECTRON MICROSCOPY; VICKERS HARDNESS TESTING;

RETROGRESSION AND REAGING (RRA) TREATMENT; RETROGRESSION CURVES;

ALUMINUM ALLOYS;

EID: 0034481492     PISSN: 10055053     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (15)

1. HUNSICKER H Y. Rosenhain Centenary Conf, London, UK, September 1975, The Metals Society, 245-262.
2. BURLEIGH T D. Postulated mechanisms for stress corrosion cracking of aluminum alloys. A review of the literature 1980-1989, 1991, CORROSION 47, (2): 89-98.
3. NAJJAR D, MAGMIN T, WARNER T J. Influence of critical surface defects and localized competition between, Mater Sci Eng, 1997, A238: 293-302.
4. CINA B. Reducing the susceptibility of alloy, particularly aluminum alloys to stress corrosion cracking, Pat. 3856584, US patent Office, Washington, DC, 24 December 1974.
5. PARK J K, ARDELL A J. Effect of retrogression and reaging treatments on the microstructure of Al-7050-T651, Metall Trans. 1984, 15A: 1531-1543.
6. OHINISHI T, IBARAKJ Y, ITO T. Improvement of fracture toughness in 7475 aluminum alloy by the RRA process, Mater Trans, JIM, 1989, 8: 601-607
7. LUKASAK D A, HART R M. Aluminum alloy development., Aerosp. Eng, 1991, 11: (9), 21-24.
8. RAJAN K, WALLACE W, BEDDOES J C. Microstructural study of a high-strength stress-corrosion resistant 7075 aluminium alloy., J Mater. Sci, 1982, 17. 2817-2825.
9. DANH N C, RAJAN K, WALLACE W. A TEM study of microstructural changes during retrogression and reaging in 7075 Aluminum, Metall Trans, 1983, 14A: 1843-1850.
10. DEGISCHER H P, LACOM W, ZAHRA A, ZAHRA C Y. Decomposition processes in an Al-5%. Zn-1%Mg alloy, Metallkd. 1980, 71: 231-238.
11. DEELASI R, ACLLER P N. Calormetric studies of 7000 series Aluminum alloys matrix precipitate characterization of 7075, Met Trans, 1977, 8A 1177-1190.
12. LLOYD D J, CHATURVEDI M C. A calorimetric study of aluninum alloy AA-7075, J Mater Sci, 1983, 17: 1819-1825.
13. LORIMER G W, NICHOLSON R B. Further result on the nucleation of precipitatess in the Al-Zn-Mg system, Act Metall, 1966: 14, 1009.
14. CORNISON A J, DAY M K B. Precipitation in the neighbourhood of grain boundaries in an Al-Zn-Mg alloy, J Inst Met, 1969: 97, 44-52.
15. HUANG Z W, LORETTO M H, WHITE J. Influence of lithiun additions on precipitation and age hardening of 7075 alloy, Materials science and technology, 1993, 9: 867-980.