Correlation between ultrasonic velocity and indentation-based mechanical properties with microstructure in Nimonic 263

Microstructure of a crystalline material is a key factor in its technological applications as it determines a wide variety of properties including mechanical strength, toughness, corrosion resistance and hardness. Precipitation takes place during processing and on prolonged exposure to service at elevated temperatures. Consequently, knowledge about the precipitation phases and their influence on the various properties is of fundamental interest not only for its intrinsic study, but also for its technological significance. The purpose of the present study is to explore the possibility of using ultrasonic velocity measurements and ball indentation technique (BIT) for investigating and correlating them for a complete characterization of the precipitation behavior in a nickel-based super alloy Nimonic 263. The present investigation reveals that both these techniques can be used for monitoring the strengthening process as a result of the precipitation on ageing at different times and temperatures.

[1]  M. D. Mathew,et al.  Ball indentation studies on the effect of aging on mechanical behavior of alloy 625 , 1999 .

[2]  V. Ravikumar,et al.  Phase precipitation and phase stability in nimonic 263 , 2001 .

[3]  V. N. Shah,et al.  Nondestructive determination of tensile properties and fracture toughness of cold worked A36 steel , 1998 .

[4]  W. Betteridge.  The nimonic alloys , 1959 .

[5]  Sam Kingman,et al.  Recent developments in microwave processing of minerals , 2006 .

[6]  B. Raj,et al.  Influence of precipitation of intermetallics on Young's modulus in nickel and zirconium base alloys , 2006 .

[7]  S. Ghosh,et al.  Materials characterization and classification on the basis of materials pile-up surrounding the indentation , 2005 .

[8]  P. Paufler,et al.  Micro- and nanoindentation techniques for mechanical characterisation of materials , 2006 .

[9]  V. Singh,et al.  Influence of ageing treatment on work hardening behaviour of a Ni-base superalloy , 1996 .

[10]  Baldev Raj,et al.  Correlation of microstructure and mechanical properties with ultrasonic velocity in the Ni-based superalloy Inconel 625 , 2002 .

[11]  D. S. Sarma,et al.  Influence of thermal fatigue on the microstructure of a Ni-base superalloy. [Nimonic 263 (NI, 20%Co, 20%Cr, 6%Mo, 2%Ti, 0. 6%Al, 0. 06%C)] , 1993 .

[12]  R. Mehrabian,et al.  Correlation between ultrasonic and hardness measurements in aged aluminum alloy 2024 , 1985 .

[13]  M. D. Mathew,et al.  Assessing microstructural changes in alloy 625 using ultrasonic waves and correlation with tensile properties , 2001 .

[14]  W. Morgner,et al.  Fundamentals of nondestructive materials characterization , 1994 .

[15]  S. Avner.  Introduction to Physical Metallurgy , 1964 .

[16]  Baldev Raj,et al.  Comprehensive microstructural characterization in modified 9Cr-1Mo ferritic steel by ultrasonic measurements , 2002 .

[17]  T. Byun,et al.  INDENTATION-ENERGY-TO-FRACTURE (IEF) PARAMETER FOR CHARACTERIZATION OF DBTT IN CARBON STEELS USING NONDESTRUCTIVE AUTOMATED BALL INDENTATION (ABI) TECHNIQUE , 1998 .