Abstract
Ball indentation technique has been employed to explore the possibilities for revealing the effect of pre-strain on mechanical properties of two groups of high-strength low-alloy steels. These steels were pre-strained up to 5%. Results are presented here for 1, 3, 4, and 5% of pre-strain effect on these steels. The dependence of yield strength, ultimate tensile strength, strength coefficient, strain-hardening component and true stress–strain curves on pre-straining effect are available from the ball indentation test, and they are validated with the standard mechanical test results. It is found that the increment of the pre-straining effect results in an increment of the yield strength and ultimate tensile strength values, while strength coefficient and strain-hardening component values are decreased. The existence of Lüders bands in the conventional stress–strain curves is also revealed in ball indentation test by the presence of the Lüders strain surrounding the indentation profile. In the conventional test it is found that the amount of Lüders bands is decreasing with increasing pre-strain. Similarly, Lüders strain as well as pile-up/sink-in of materials surrounding the indentation decrease as the pre-straining increases. It is found that ball indentation technique can be effectively used to determine the minute changes of mechanical properties due to introducing small amount of pre-straining.
The authors would like to thank Dr. S. Tarafder, Dr. Surendra Kumar, Dr. Siva Prasad and Shri P. K. Dey for their help and stimulating discussions. One of the authors is also grateful to the CSIR for offering senior reseach followship to carry out this work. They wish to express their gratitude to Prof. S. P. Mehrotra, Director, NML for encouragement and permission to publish this work.
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© 2004 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Werner-Köster-Preis
- den Werner-Köster-Preis 2003
- Festabend zum 85. Geburtstag der DGM
- Festabend zum 85. Geburtstag der DGM
- Articles Applied
- NiAl – material for the application in gas turbines
- High-temperature creep behavior and hot-pressing consolidation of NiAl
- Direct Strip Casting of Magnesium
- Thermo-mechanical analysis of cast/mould interaction in casting processes
- Aluminum–Lithium alloy development for thixoforming
- On the influence of heavy warm reduction on the microstructure and mechanical properties of a medium-carbon ferritic –pearlitic steel
- Thermodynamic assessment of the Dy–Mg system
- Influence of pre-straining on mechanical properties of HSLA steel by using ball indentation technique
- Fabrication and application of co-continuous Al2O3/Al composite by reactive infiltration of molten Al into the preform of SiO2 with cordierite addition
- Articles Basic
- Simulation of cellular-dendritic solidification structures of binary alloys in three-dimensional growth using a multiparticle diffusion-limited aggregation model
- Microstructure and age-hardening effects of aluminium alloys with additions of scandium and zirconium
- Notifications / Mitteilungen
- Personal/Personelles
- Materials Week
- News/Aktuelles
- Books/Bücher
- Conferences / Konferenzen
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Werner-Köster-Preis
- den Werner-Köster-Preis 2003
- Festabend zum 85. Geburtstag der DGM
- Festabend zum 85. Geburtstag der DGM
- Articles Applied
- NiAl – material for the application in gas turbines
- High-temperature creep behavior and hot-pressing consolidation of NiAl
- Direct Strip Casting of Magnesium
- Thermo-mechanical analysis of cast/mould interaction in casting processes
- Aluminum–Lithium alloy development for thixoforming
- On the influence of heavy warm reduction on the microstructure and mechanical properties of a medium-carbon ferritic –pearlitic steel
- Thermodynamic assessment of the Dy–Mg system
- Influence of pre-straining on mechanical properties of HSLA steel by using ball indentation technique
- Fabrication and application of co-continuous Al2O3/Al composite by reactive infiltration of molten Al into the preform of SiO2 with cordierite addition
- Articles Basic
- Simulation of cellular-dendritic solidification structures of binary alloys in three-dimensional growth using a multiparticle diffusion-limited aggregation model
- Microstructure and age-hardening effects of aluminium alloys with additions of scandium and zirconium
- Notifications / Mitteilungen
- Personal/Personelles
- Materials Week
- News/Aktuelles
- Books/Bücher
- Conferences / Konferenzen