Deformation Mechanisms at Elevated Temperatures: Influence of Momenta and Energy in the Single Impact Test

Within this work High Temperature Single Impact Studies were performed to evaluate deformation mechanisms at different energy and momentum levels. To show the influence of different microstructures and hardness levels and their response to single impacts four different materials were tested at various temperatures up to 700°C. One carbide reinforced NiCrBSi based Metal Matrix Composite and three different steels were tested. The aim of this work is to determine critical energies for fracture appearance and the materials response at different energy and momenta levels. Critical impact loadings were examined at elevated temperatures to limit operating conditions in impact dominated regimes at elevated temperatures. The investigations on the mechanisms were performed using different means of microscopy at the surface and in metallographic cross sections. Results indicate temperature dependence of the occurrence of cracks in hardphase rich materials, such as Metal Matrix Composites High Speed Steels and the influence of different impact momenta at constant energies on the deformation of different steels.




References:
[1] J.A. Collins, H. Busby, G.H. Staab, Mechanical Design of Machine
Elements and Machines. Hoboken: Wiley VCH, 2003, ch.4.
[2] H. Winkelmann, E. Badisch, M. Kirchgaßner, H. Danninger, "Wear
Mechanisms at High Temperatures. Part 1: Wear Mechanisms of
Different Fe-Based Alloys at elevated temperatures," Tribol. Letters,
vol. 34, pp. 155-166, March 2009.
[3] H. Winkelmann, M. Varga, E. Badisch, H. Danninger, "Wear
Mechanisms at High Temperatures. Part 2: Temperature Effect on Wear
Mechanisms in the Erosion Test," Tribol. Letters, vol. 34, pp. 167-175,
March 2009.
[4] H. Winkelmann, E. Badisch, M. Varga, H. Danninger, "Wear
Mechanisms at High Temperatures. Part 3: Changes of the Wear
Mechanisms in the Erosion Test," Tribol. Letters, vol. 37, pp. 419-429,
January 2010.
[5] H.J. Bargel, G. Schulze, Werkstoffkunde. Heidelberg: Springer-Verlag,
2008, ch.1.
[6] H. Rojacz, M. Hutterer, H. Winkelmann, "High temperature single
impact studies on material deformation and fracture behavior of metal
matrix composites and steels," Materials Sci. and Eng. A, vol. 562, pp.
39-45, November 2012.
[7] S. Tianmin, H. Meng, T.H. Yuen, "Impact wear behavior of laser
hardened hypoeutectoid 2Cr13 martensite stainless steel," Wear, vol.
255, pp. 444-455, August 2003.
[8] H. Rojacz, H. Winkelmann, M. Varga, "Verhalten von
Eisenbasiswerkstoffen unter Einezelschlagbelastung," in Proc. ÖTG
Symposia 2011, Wiener Neustadt, 2011, pp- 143-152.
[9] A. Zikin, I. Hussainova, C. Katsich, E. Badisch, C. Tomastik,
"Advanced chromium carbide-based hardfacings," Surface and Coatings
Technol., vol. 206, pp. 4270-4278, May 2012.
[10] M. Kirchgaßner, E. Badisch, F. Franek, "Behavior of iron-based
hardfacing alloys under abrasion and impact," Wear, vol. 265, pp. 772-
779, August 2006.
[11] K. Wellinger, H. Breckel, "Kenngrössen und Verschleiss beim Stoss
metallischer Werkstoffe," Wear, vol. 13, pp. 257-281, April 1969.
[12] E. Hornbogen, G. Eggeler, E. Werner, Werkstoffe - Aufbau und
Eigenschaften. Heidelberg: Springer-Verlag, 2012, ch.4.
[13] S.L. Kakani, A. Kakani, Materials Science, New Delhi: New Age
Publishers, 2004, ch.7.
[14] H. Winkelmann, M. Varga, E. Badisch, ÔÇ×Influence of Secondary
precipitation in Fe-based MMCs on high temperature wear," Tribol.
Letters, vol. 43, pp.229-235, Aug. 2011.
[15] N. Chawla, K.K. Chawla, Metal Matrix Composites, New York:
Springer, 2000, ch.10.
[16] H. Rojacz, A. Zikin, C. Mozelt, H. Winkelmann, E. Badisch, "High
temperature corrosion studies of cermet particle reinforced NiCrBSi
hardfacings," Surface and Coatings Technol., vol. 222, pp. 90-96,
February 2013.
[17] A. Zikin, E. Badisch, I. Hussainova, C. Tomastik, H. Danninger,
"Characterisation of TiC-NiMo reinforced Ni-based hardfacing,"
Surface and Coatings Technol., to be published.
[18] A. Zikin, M. Antonov, I. Hussainova, L. Katona, A. Gavrilovic, "High
temperature wear of cermet particle reinforced NiCrBSi hardfacings,"
Tribology Int., to be published.
[19] G. Krauss, "Martensite in steel: strength and structure," Mater. Sci. and
Eng., vol. A 273, pp. 40-57, Dec. 1999.
[20] G. W. Stachowiak, A.W. Batchelor, Engineering Tribology. Burlington:
Elsevier Butterworth Heinemann, 2005, ch. 15.
[21] R.O. Ritchie,"Mechanisms of fatigue-crack propagation in ductile and
brittle solids," Int. J. of Fracture, vol. 100, pp. 55-83, May 2008.