The relationship between microstructure and acoustic emission (AE) detected during tensile deformation has been investigated for the commercial aluminium alloys 7075–T7351 and 7050–T7351. Also, AE measurements made during tensile deformation of 7075–T7351 and high-purity aluminium have been compared with those made during compressive deformation. It is concluded that the fracture of brittle inclusions is the source of AE detected during tensile deformation of the alloys. An observed variation in AE activity from specimen to specimen (of both alloys) has been attributed to the inhomogeneous distribution of these inclusions in the plates used for specimen manufacture.
Get full access to this article
View all access options for this article.
References
1.
ACHENBACHJ. D. and HARRISJ. G.: J. Appl. Mech., 1979, 46, 107.
2.
WADLEYH. N. G., SCRUBYC. B., and SPEAKEJ. H.: int. Met. Rev., 1980, 25, 41.
3.
SCRUBYC. B., WADLEYN. G.II., and SINCLAIRJ. E.: Periodic inspection of pressurized components’, 127–136; 1979, London, Institution of Mechanical Engineers.
4.
ROSEL. R. F.: Int. J. Fract., 1981, 17, 45.
5.
GRAHAML. J. and MORRISW. L.: Proc. ASNT 35th National Fall Conf., 1975, Atlanta, Ga, American Society of Nondestructive Testing.
6.
CARPENTERS. H. and HIGGINSF. P.: Metal!. Trans., 1977, 8A, 1629.
7.
HAMSTADM. A. and MUKHERJEEA. K.: J. Test. Eval., 1976, 4, 313.
8.
HAMSTADM. A., BIANCHETTIR., and MUKHERJEEA. K.Eng. Fract. Mech., 1977, 9, 663.
9.
HAMSTADM. A. and MUKHERJEEA. K.: UCRL-77502; 1975, Berkeley, Calif., University of California Lawrence Livermore Laboratory.
10.
SCALAC. M. and S. mac. COUSLAND: Tenth Int. Cong. on ‘Acoustics’, 1980, Sydney, Australia.
11.
SCALAC. M. and S. McK. COUSLAND: Proc. Ninth World Conf. on ‘Nondestructive testing’, 1979, Melbourne, Australia.
12.
PHRAGMENG.: J. Inst. Met., 1950, 77, 489.
13.
ROSEL. R. F.:Nondestruct. Eval., 1980, 1, 149.
14.
FIELDJ. E.: Contemp. Phys., 1971, 12, 1.
15.
FISHERR. M. and LALLYJ. S.: Can. J. Phys., 1967, 45, 1147.
16.
WADLEYH. N. G. and SCRUBYC. B.: Met. Scl., 1978, 12, 285.
