A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microstructure and mechanical properties of a low carbon carbide-free bainitic steel co-alloyed with Al and Si
Highlight ► A low carbon carbide-free bainitic steel was produced. ► Co-alloying with Al and Si suppresses the precipitation of cementite. ► Fine carbide-free bainite laths and thin film-like retained austenite obtained. ► Excellent combination of strength, ductility and toughness enabled.
Abstract A low carbon, low alloy steel has been investigated for producing low carbon carbide-free bainitic microstructure by co-addition of alloying elements of aluminum and silicon. The influence of heat treatment process on microstructure, impact toughness as well as tensile properties was investigated by light optical microscopy, transmission electron microscopy, X-ray diffraction and mechanical property tests. The results demonstrate that the co-addition of aluminum and silicon in the investigated steel plays an effective role in suppressing the precipitation of cementite. A desired microstructure consisting of mainly fine-scale carbide-free bainitic ferrite and thin film-like retained austenite located between the ferrite laths was obtained and accordingly an excellent combination of toughness, ductility and strength was achieved by optimized heat treatments, i.e. by isothermal treatment at 320°C for ∼84min or more. The microstructure-mechanical property relationships are discussed.
Microstructure and mechanical properties of a low carbon carbide-free bainitic steel co-alloyed with Al and Si
Highlight ► A low carbon carbide-free bainitic steel was produced. ► Co-alloying with Al and Si suppresses the precipitation of cementite. ► Fine carbide-free bainite laths and thin film-like retained austenite obtained. ► Excellent combination of strength, ductility and toughness enabled.
Abstract A low carbon, low alloy steel has been investigated for producing low carbon carbide-free bainitic microstructure by co-addition of alloying elements of aluminum and silicon. The influence of heat treatment process on microstructure, impact toughness as well as tensile properties was investigated by light optical microscopy, transmission electron microscopy, X-ray diffraction and mechanical property tests. The results demonstrate that the co-addition of aluminum and silicon in the investigated steel plays an effective role in suppressing the precipitation of cementite. A desired microstructure consisting of mainly fine-scale carbide-free bainitic ferrite and thin film-like retained austenite located between the ferrite laths was obtained and accordingly an excellent combination of toughness, ductility and strength was achieved by optimized heat treatments, i.e. by isothermal treatment at 320°C for ∼84min or more. The microstructure-mechanical property relationships are discussed.
Microstructure and mechanical properties of a low carbon carbide-free bainitic steel co-alloyed with Al and Si
Qian, Lihe (author) / Zhou, Qian (author) / Zhang, Fucheng (author) / Meng, Jiangying (author) / Zhang, Ming (author) / Tian, Yuan (author)
2012-02-25
5 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2012
Low cycle fatigue behavior in a medium-carbon carbide-free bainitic steel
| British Library Online Contents | 2016
Nano-sized precipitation and properties of a low carbon niobium micro-alloyed bainitic steel
| British Library Online Contents | 2015
Crystallography of carbide-free bainite in a hard bainitic steel
| British Library Online Contents | 2006
Sliding wear and low cycle fatigue properties of new carbide free bainitic rail steel
| British Library Online Contents | 2014