This work used linear ultrasonic phased arrays to scan notches and real discontinuities at a range of angles to determine how much reflected signal amplitudes are affected by poor orientation.
Brasche, L.J.H., D.J. Bracci, D.C. Jiles and O. Buck, “Electrical and
Mechanical Properties of Precipitation Hardened Al-Li Alloys,” Materials
Science and Engineering A, Vol. 119, 1989, pp. 7–15.
Brauer, G., L. Liszkay, B. Molnar and R. Krause-Rehberg‚“Microstructural
Aspects of Neutron Embrittlement of Reactor Pressure Vessel Steels – A
View from Positron Annihilation Spectroscopy,” Nuclear Engineering and
Design, Vol. 127, 1991, pp. 47–54.
Dobmann, G., Luigi Debarberis and Jean-Francois Cosle, “Aging Material
Evaluation and Studies by Non-destructive Techniques (AMES-NDT) A
European Network Project,” Nuclear Engineering and Design, Vol. 206,
2001, pp. 363–374.
Floreen, S. and R.F. Decker, “Heat Treatment of 18% Ni Maraging Steel,”
Source Book on Maraging Steels, R.F. Decker, ed., Metals Park, Ohio, ASM,
1979, pp. 20–32.
Gur, C.H. and I. Yildiz, “Non-destructive Investigation on the Effect of
Precipitation Hardening on Impact Toughness of 7020 Al-Zn-Mg Alloy,”
Materials Science and Engineering A, Vol. 382, 2004, pp. 395–400.
Jin, S., D. Huang and J.W. Morris, Jr., “Structure and Properties of a
Microduplex Maraging Steel,” Metallurgical Transactions A, Vol. 7A, 1976,
Kirkegaard, P., M. Eldrup, O.E. Mogensen and N.J. Pedersen, “Program
System for Analysing Positron Lifetime Spectra and Angular Correlation
Curves,” Computer Physics Communications, Vol. 68, 1981, pp. 307–335.
Kumar A., T. Jayakumar, Baldev Raj and K.K. Ray, “Correlation between
Ultrasonic Shear Wave Velocity and Poisson’s Ratio for Isotropic Solid
Materials,” Acta Materialia, Vol. 51, 2003, pp. 2417–2426.
Ledbetter, H.M. and D.T. Read, “Low-Temperature Elastic Properties of a
300-Grade Maraging Steel,” Metallurgical and Materials Transactions A,
Vol. 8A, Nov. 1977, 1805–1808.
Li, P., S.L. Chu, C.P. Chou and F.C. Chen, “Use of Ultrasonic Velocity for
Nondestructive Evaluation of Ferrite Content in Duplex Fe-Mn-Al Alloy
Steels,” Scripta Metallurgica et Materialia, Vol. 26, 1992, pp. 127–132.
Miller, G.P. and W.I. Mitchell, “Structure and Hardening Mechanisms of
18% Nickel-Cobalt-Molybdenum Maraging Steels,” Journal of the Iron and
Steel Institute, Vol. 203, 1965, pp. 899–904.
Moore, K.D., P.L. Jones and H.F. Cocks, “A Positron Annihilation Study of
the Precipitation Hardening Effects in a Maraging Steel,” Physica Status
Solidi A, Vol. 72, 1982, pp. K223–K227.
Peters, D.T. and C.R. Cupp, “The Kinetics of Aging Reactions in 18 Pct Ni
Maraging Steels,” Transactions of the Metallurgical Society of AIME, Vol.
236, 1966, pp. 1420–1429.
Rajaraman, R., P. Gopalan, B. Viwanathan and S. Venkadesan,
“A Positron Annihilation Study of TiC Precipitation in Plastically
Deformed Austenitic Stainless Steel,” Journal of Nuclear Materials, Vol.
217, 1994, pp. 325–328.
Rajkumar, K.V., S. Vaidyanathan, Anish Kumar, T. Jayakumar, Baldev Raj
and K.K. Ray, “Characterization of Aging-Induced Microstructural
Changes in M250 Maraging Steel Using Magnetic Parameters,” Journal of
Magnetism and Magnetic Materials, Vol. 312, 2007a, pp. 359–365.
Rajkumar, K.V., Anish Kumar, T. Jayakumar, Baldev Raj and K.K. Ray,
“Characterization of Aging Behavior in M250 Grade Maraging Steel Using
Ultrasonic Measurements,” Metallurgical and Materials Transactions A, Vol.
38A, 2007b, pp. 236–243.
Sha, W., A. Cerezo and G.D.W. Smith, “Phase Chemistry and Precipitation
Reactions in Maraging Steels: Part I. Introduction and Study of Cocontaining
C-300 Steel,” Metallurgical and Materials Transactions A, Vol.
24A, 1993, pp. 1221–1232.
Vasudevan, V.K., S.J. Kim and C.M. Wayman, “Precipitation Reactions and
Strengthening Behavior in 18 Wt Pct Nickel Maraging Steels,” Metallurgical
and Materials Transactions A, Vol. 21A, 1990, pp. 2655–2668.
Zaitseva, R.D. and M.D. Perkas, “Factors Determining the Ductility and
Toughness of Maraging Steels,” Metal Science and Heat Treatment, Vol.
17, No. 9, 1975, pp. 729–736.