Synergistic Investigations of Post Deformation Annealing and Initial Microstructure on the Mechanical Properties of HSLA‐100 Steel

Author(s):  
Ali Heydarinia ◽  
Ali Koushki ◽  
Novin Rasooli ◽  
Mohammad Reza Hosseinzadeh ◽  
Mohammad Javad Sohrabi ◽  
...  
2010 ◽  
Vol 73 ◽  
pp. 22-26 ◽  
Author(s):  
Takeo Muroga ◽  
Takuya Nagasaka ◽  
Peng Fei Zheng ◽  
J.M. Chen

V-4Cr-4Ti alloy is an attractive candidate low activation structural material for nuclear fusion reactors. The properties of V-4Cr-4Ti during its operation strongly depend on initial microstructure, especially size and density of Ti-rich precipitates and their interaction with dislocations. This paper focuses on the effects of the precipitate states and other microstructural variables on mechanical properties of V-4Cr-4Ti alloys and the potential methods to improve the properties by microstructural control, based on Transmission Electron Microscopy.


2010 ◽  
Vol 654-656 ◽  
pp. 306-309
Author(s):  
Sim Kun Min ◽  
Sung Il Kim ◽  
Jong Sang Kim ◽  
Moon Hi Hong

This paper examines the effect of initial microstructure after hot rolling on the final microstructure and mechanical properties for Cu bearing Extra Low Carbon(ELC) Steel Sheets. For this purpose, two ELC steels having different initial microstructures due to different onset time of cooling after pilot hot rolling (0.4 and 1.2 second) were selected. Mechanical properties and microstructures were analyzed as well using uni-axial tensile test, electron back-scattered diffraction (EBSD) technique following pilot rolling and continuous annealing. It has been found that the reduction of onset time of cooling gives rise to the grain refinement in hot rolled sheets. The average grain sizes of hot rolled sheetss at the onset time of 0.4 and 1.2 second are 16.7μm and 20.8 μm, respectively. In addition, the planar anisotropy of the Cu bearing ELC steel sheets has improved with reducing onset time of cooling after hot rolling. However, other mechanical properties such as strength and elongation of annealed steel are similar to both cooling condition.


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