Thermomechanical treatment method for providing super-plasticity

Details Thermomechanical treatment method for providing super-plasticity Thermomechanical treatment method for providing super-plasticity

1994-04-25

1995-10-10

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148564, 148692, 148695, 148696, 420902, C22F 104

Patent

active

054567742

ABSTRACT:
A thermo mechanical treatment method for providing super-plasticity to Al--Li alloy being a kind of light and high strength alloys. The thermo mechanical treatment method according the invention comprises steps of, homogenizing Al--Li alloy consisting of Al--Cu--Li--Mg--Zr at a temperature of 500.degree.-500.degree. C. for 10-30 hours, and controlled rolling the alloy at a temperature of 300.degree.-500.degree. C., a rolling speed of 2-20 m/min and a draft percentage per pass of 2-18%. The thermo mechanical treatment of the invention has a wide industrially applicable range and thus an excellent operation efficiency. The thermo mechanical treatment exhibits excellent super-plasticity at a higher strain speed as compared with known treatments.

REFERENCES:
patent: 4582544 (1986-04-01), Grimes, et al.
patent: 4830682 (1989-05-01), Ashton et al.
H. Yoshida, et al. J. Jpn. Inst. Light Met., vol. 39 (1989), pp. 817-823.

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