The prevention of metallurgical defects in medium-and high-strength aluminum extrusions

Light Metal Age

Volumn 57, Issue 5-6, 1999, Pages 30-54

  Bryant, A J ^c   Dixon, ^a   Fielding, Roger A P ^b  

^a QED Extrusion Developments Inc   (United States)

^b UNIVERSITY OF STRATHCLYDE   (United Kingdom)

^c NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0039036135     PISSN: 00243345     EISSN: None     Source Type: Trade Journal    
DOI: None     Document Type: Article

References (57)

1. Smith, C., The Extrusion of Aluminium Alloys, J. Inst. Metals, 1950, 76, 429-451.
2. Woodward, A.R., Fatigue Strength of Unmachined Extruded and Rolled Specimens in Various Aluminum Alloys, Metallurgia, 1968, 22, (3), 219-223.
3. Lynch, C.V., Influence of Production Conditions on the Quality of Extruded Sections in Al-Mg-Si Alloys, Z. Metallkunde, 1971, 62, 710-715.
4. Locke, D.H,. Exaggerated Coarse Grain in Aluminum Alloy Extrusions, Metallurgia, 1954, 50, 268.
5. Genders, R., The Extrusion Defect, J. Inst. Metab. 1921, 26, 232.
6. Northcott, I., D. McLean, and O.R. Lee, The Effect of Single and Multhhole Die Extrusion on die Properties of Extruded Aluminum Alloy Bar, Ibid., 1948, 74, 81-93.
7. Bryant, A.J., Classification of Extrusion Defects, Z. Metallkunde, 1971, 62, 705-710.
8. Parson, N.C., J.D. Hankin, and A.J. Bryant, The Metallurgical Background to Problems Occurring During the Extrusion of 6XXX Alloys. Proceedings: Aluminum Association, Fifth Extrusion Technology Seminar, 1992, Vol. I, 13-23.
9. Pumphrey, W.I., and P.H. Jennings, A Consideration of the Constitution of Al-Fe-Si Alloys and its Relation to Cracking above the Solidus, J. Inst. Metals , 1947-48, 74, 249-258.
10. Pumphrey, W.I., P.H. Jennings, and A.R.E. Singer, Hot-shortness of some High-purity Aluminum Alloys in the Systems Al-Cu-Si and Al-Mg-Si, J. Inst. Metals, 1947-48, 74, 227-248.
11. Buxmann, K., Solidification Conditions and Microstructure in Continuously-Cast Aluminum, J. Metals, April 1982, 28-34.
12. Parson, N.C., C.W. Jowett, W.C. Fraser, and C.V. Pelow, Surface Defects in 6XXX Alloy Extrusions, Proceedings: Aluminum Association, Sixth Extrusion Technology Seminar, 1996, Vol. I, 57-67.
13. Harris, I.R., and P.C. Varley, Factors Influencing Brittleness in Al-Mg-Si alloys, J. Inst. Metals, 1953-54, 82, 379-393.
14. Das, A.K., Special Features of Process Defects in Aluminum Alloy Extrusions, Proceedings: Aluminum Association, Fourth Extrusion Technology Seminar, 1988, Vol. II, 227-233.
15. S.N.I.A.S. (French National Specification) AIR-9050C.
16. Crowther, J., Overheating Phenomena in Al-Cu-Mg-Si alloys of the Duralumin Type, J. Inst. Metals, 1950, 76, 201-236.
17. Smith, D.P., The Constitution of Quaternary Al-Cu-Mg-Si alloys at 500° C, Metallurgia, May 1961, 223-230.
18. Phillips, H.W.L., Annotated Equilibrium Diagrams of Aluminum Alloy Systems, The Institute of Metals, London: 1959, Monograph and Report Series No.25.
19. Tumer, A.N., and A.J. Bryant, The Effect of Ingot Quality on the Mechanical Properties of High-strength Aluminum Alloy Plate, J. Inst. Metals, 1967, 95, 353-359.
20. Tumer, A.N., and A.J. Bryant, Identification of Oxide Defects in High-strength Aluminum Alloy Thick Plate, J. Inst. Metals , 1964, 92, 253-254.
21. Aluminum Company of America: ALCOA Technical Publication 1962: Mechanical and Corrosion Properties of AA2024 Alloy.
22. Hume-Rothery, W., and D.J. Strawbridge, A.J. Little, The Constitution of Al-Zn-Mg-Cu Alloys at 460C, J. Inst. Metals, 1947-48, 74, 159.
23. Little, K., H.J. Axon, and W. Hume-Rothery, The Constitution of Al-Zn-Mg-Cr Alloys, J. Inst. Metals, 1948-49, 75, 39.
24. Little, A.J., G.V. Raynor, and W. Hume-Rothery, The Constitution of Al-Zn-Mg-Mn Alloys J. Inst. Metals, 1943, 69, 423-467.
25. Axon, H.J., and W. Hume-Rothery, The Effect of 1% Silicon on the Constitution of Al-Zn-Mg-Mn Alloys, J. Inst. Metals, 1947-48, 74, 315.
26. Stokeld, F.E., The Hot Forging and Hot Stamping of Aluminum and its Alloys, J. Inst. Metals, 1950, 76, 453472.
27. British Aerospace Ltd., Materials Specification No. BAEM 4008.
28. J. Inst. Metals., Symposium on Internal Stress, 1948.
29. Baker, W.A. et al., Recent Developments in High-Strength Aluminum Alloys, Journal of the Royal Aeronautical Society, August 1966, 70, 757-762.
30. Sheppard, T., and D. Raybould, A New Approach to the Construction of Extrusion Limit Diagrams: J. Inst. Metals, 1973, 101, 103.
31. Sheppard, T., The Application of Limit Diagrams to Extrusion Process Control, Proceedings: Aluminum Association, Second Extrusion Technology Seminar, 1977, Vol. I, 331-337.
32. Alcan Second Colloquium on Extrusion, Bad Homburg, April 1968: Proceedings Published in Separate Papers in Aluminium (Germany), April-October 1968.
33. Clode, M.P. and T. Sheppard, Extrusion Limit Diagrams Containing Structural and Topological Information for AA6061 Aluminum Alloy, Mat. Sci. Tech., April 1993, 9, 313-319.
34. Laue, K., and H. Stenger, Extrusion Processes and Equipment (Translation by A.F. Castle and G. Lang,) A.S.M.(Metals Park), 1981, 106-109.
35. Pearson, C.E., and R.M. Parkins, The Extrusion of Metals, 1961, London, Chapman and Hall.
36. Willis, J., and A.J. Bryant, Cold Extrusion of Aluminum Alloys, Z. Metallkunde, 1970, 61, 683-692.
37. Dunn, P., B. Lengyei, Lubrication and Friction in Hydrostatic Extrusion/Drawing, J. Inst. Metals, 1972, 100, 317-321.
38. Durrschnabel, W., Observations on Metal Flow in Extrusion, Part 1, Metall, 22, 1968, 426-437.
39. Durrschnabel, W., Observations on Metal Flow in Extrusion, Part 2, Metall, 22, 1968, ,995-998.
40. Titmuss, G., Eliminating Periferal Corse Grain and Improving Productivity, Light Metal Age, Vol. 57, 5-6, 1999
41. Aluminum Association: Aluminum Standards and Data, 1988.
42. Hug, H., The New Aluminum Alloy Unidal: Schweizer Aluminium Rundschau, 1963, 2, 49.
43. Thomas, A.T., and A.J. Bryant, Grain Structure and Quench-Sensitivity in an Extruded Al-Zn-Mg Alloy, J. Inst. Metals, 1972, 100, 4044.
44. Bryant, A.J., The Effect of Composition on the Quench-Sensitivity of Some Al-Zn-Mg Alloys, J. Inst. Metals, 1966, 94, 94-99.
45. Bryant, A.J., Proceedings, D.G.M. Symposium on Grain structure in Aluminum Alloys, Deutsche Gesellschaft fur Metallkunde, Villach (Austria), 1973.
46. Bryant, A.J., Ph.D. Thesis, University of London, (UK), 1965.
47. Wilson, C., Aircraft Production, April 1955.
48. Pashley, J.W., J.W. Rhodes and A. Sendorek, Delayed Ageing in Al-Mg-Si alloys, Effect on Structure and Mechanical Properties, J. Inst. Metals, 1966, 94, 4149.
49. Kelly, A., and R.B. Nicholson, Progress in Materials Science, Vol. X, No. 3, 149, 1963, Oxford: Pergarnon Press.
50. Matsuda, K. et al., Prevention of Cast cracks in Al-Zn-Mg-Cu Alloy Castings: Proceedings: Aluminum Association, Sixth Extrusion Technology Seminar, 1996, Vol. II, 525-528.
51. Reiso, O., The Effect of Composition and Homogenising Treatment on Extrudability of Al-Mg-Si Alloys, Proceedings: Aluminum Association, Third Extrusion Technology Seminar, 1984, Vol. I, 31-40.
52. Lui, J., and F.H. Froes, Aluminum Alloys for Aerospace Applications: A Review, Synthesis of Lightweight Metals 111, The Minerals, Metals & Materials Society, 1999, 103-111.
53. Johannes, V.I., C.W. Jowett, and R.F. Dickson, Transverse Weld Defects: Proceedings: Aluminum Association, Sixth Extrusion Technology Seminar, 1996, Vol. II, 89-94.
54. Akeret, R., Properties of Pressure Welds in Extruded Aluminium Alloy Sections, J. Inst. Metab, 1972,100,202.
55. Valberg, H., Extrusion Welding in Porthole Die Extrusion, Proceedings: Aluminum Association, Sixth Extrusion Technology Seminar, 1996,Vol. II, 213-224.
56. Steele, L.E., and D.L.W. Collins, "Giant" Chromium Intermetallics in Commercial Al-Zn-Mg-Cu alloys, J. Inst. Metals, 1959-60, 88, 260-265.
57. Aluminum Association, Alloy Registration Record, 1994.