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<p>Structure-Property Correlation of Hypoeutectic Al-7.6Si Alloys with and without Al-5Ti-1B Grain Refiner</p>

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Title Statement <p>Structure-Property Correlation of Hypoeutectic Al-7.6Si Alloys with and without Al-5Ti-1B Grain Refiner</p>
 
Added Entry - Uncontrolled Name Biswas, Prosanta ; Department of Metallurgical and Materials Engineering, National Institute of Technology, Durgapur 713 209, West Bengal, India
Gupta, Sourabh ; Durgapur Steel Plant (Steel Authority of India Limited), Durgapur-713 203, West Bengal, India
Mondal, Manas Kumar; 1Department of Metallurgical and Materials Engineering, National Institute of Technology, Durgapur 713 209, West Bengal, India
Bhandari, Rahul ; Luthfaa Polytechnic Institute, Durgapur-713 212, West Bengal, India
Pramanik, Susanta ; Department of Metallurgical and Materials Engineering, National Institute of Technology, Durgapur 713 209, West Bengal, India
 
Uncontrolled Index Term Hardness; Fracture behaviour; Mechanical properties; Microstructure evolution; Phase analysis
 
Summary, etc. <p style="text-align: justify;">Hypoeutectic Al-7.6Si alloy has been developed with and without Al-5Ti-1B grain refiner through the gravity casting method. Effects of 2, 4, and 6 wt % master alloy (Al-5Ti-1B) addition on the microstructural morphology, mechanical properties (percentage elongation (%El) and ultimate tensile strength (UTS)), hardness and fracture behaviour of the Al-7.6Si alloy have been investigated. Unmodified hypoeutectic Al-7.6Si alloy consists of needle and rod-like eutectic Si ((Si)<sub>E</sub>) particles with sharp corners inside the Al<sub>α</sub> phase. In the grain refined Al-7.6Si alloy, TiB<sub>2</sub> is formed and these TiB<sub>2</sub> acts as a potential site for nucleation of Al<sub>α</sub> grains. Therefore, the grain refined alloys have fine globular Al<sub>α</sub> grains and fibrous (Si)<sub>E</sub> phase. The bulk hardness, UTS and elongation (%) are increased in the grain refined alloys. Further, fractography show that the cleavage fracture is reduced in the modified alloy and fine dimple formation is increased.</p>
 
Publication, Distribution, Etc. Journal of Scientific and Industrial Research (JSIR)
2020-11-09 16:51:55
 
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http://op.niscair.res.in/index.php/JSIR/article/view/41414
 
Data Source Entry Journal of Scientific and Industrial Research (JSIR); ##issue.vol## 79, ##issue.no## 8 (20)
 
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