Borocarbide coarsening and the effect of borocarbide particle size on Charpy V-notch impact properties of medium-carbon boron-containing steel
-
João Paulo Gomes Antunes Costa
,
Miguel Justino Ribeiro Barboza
Abstract
Boron-added steel has been used in several automotive components in which the energy absorbed in impact testing is an important requirement. Previous thermodynamic studies have shown that boron addition promotes significant change in equilibrium phases, increasing the volume fraction of precipitated phases, mostly due to increased carbide stability and formation of borocarbides. As volume fraction, size and distribution of precipitates influence the absorbed energy in impact testing of steels, it is important to study M23(B,C)6 borocarbide precipitation and coarsening kinetics and its effects on Charpy V-notch absorbed energy of boron steels. In the present work, borocarbide coarsening kinetics were evaluated using optical microscopy in samples heat-treated at 880 0C for different times. The borocarbide coarsening kinetics data suggest that growth is controlled by an interfacial reaction mechanism. The Charpy V-notch absorbed energy decreases with increasing borocarbide section size and the embrittlement was successfully described by an empirical equation.
© 2020 by Walter de Gruyter Berlin/Boston
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- CONTENTS
- Original Contributions
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- Short Communications
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- Notifications
- DGM
- Conferences
- Imprint
Articles in the same Issue
- CONTENTS
- Original Contributions
- Preparation of silicon boride SiBx (x = 3, 4, 5, 6) powders by chemical oven self-propagating combustion synthesis
- Structural, electrical and magnetic properties of glucose-capped CdS nanoparticles
- Microstructure and texture of Ti-6Al-4V alloy deformed by rotary forging at elevated temperatures
- The influence of multi-pass friction stir processing on microstructure and sliding wear behavior of Cu/ZrO2 surface composite
- Mechanical bonding in cold roll-cladding of tri-layered brass/steel/brass composite
- Borocarbide coarsening and the effect of borocarbide particle size on Charpy V-notch impact properties of medium-carbon boron-containing steel
- Study on photocatalytic activity based on different pH values of AgBr/Ag2CO3 heterojunction
- Study of the crystallization kinetics of a Zr57Cu15.4Ni12.6Al10Nb5 amorphous alloy
- Highly efficient biocide silver-doped soda lime glass for application in water quality optical sensors
- The synergistic effect of 2-mercaptobenzotiazole and zinc nitrate as corrosion inhibitor on carbon steel in saline solution
- Short Communications
- Accelerated degradation rate of high-strength Mg-4Y-1Zn alloy by Cu addition for degradable bridge-plug applications
- Notifications
- DGM
- Conferences
- Imprint
