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Effect of water and mercury quenching on microstructure and mechanical behavior of room temperature rolled Zircaloy-2<br />

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Title Statement Effect of water and mercury quenching on microstructure and mechanical behavior of room temperature rolled Zircaloy-2<br />
 
Added Entry - Uncontrolled Name Goel, Sunkulp ; Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing, 210094, China
Singh, Dharmendra ; Department of Mechanical Engineering, Government Engineering College Bikaner Rajasthan, 334004, India
Kumar, Nikhil ; Assistant Professor School of Materials Science and Technology IIT (BHU), India
Kumar, Abhishek ; Associate Professor, Applied Mechanics Department Motilal Nehru National Institute of Technology Allahabad Prayagraj, Uttar Pradesh, India-211004
Singh, Punit ; Institute of Engineering and Technology, Department of Mechanical Engineering, GLA University, Mathura, UP-281406
 
Uncontrolled Index Term materials science
Ultrafine grains, Zircaloy-2, Transmission electron microscopy, Electron back scattered diffraction, Annealing, Quenching
 
Summary, etc. <p>The present study investigates the effect of water and mercury quenching on the microstructural and mechanical behavior of room temperature rolled Zircaloy-2. Solution treatment of zircaloy-2 at 1073 K followed by quenching in mercury and water has been performed prior to rolling. Different reduction from 25% to 85% of the quenched alloy and further characterization has been performed by tensile testing, Electron back scattered diffraction (EBSD) and Transmission Electron Microscopy (TEM). Enhanced tensile strength (745 MPa) after 85% rolling reduction was obtained compared to 389 MPa after water quenching. Rolling reduction results an increase in the dislocation density, thereby enhancing the mechanical strength. Initial deformation has been observed by the activation of extension twinning from EBSD microstructure. Twinning results the inclination of ‘c’ axis towards the normal direction which makes near basal grains orientation along the deformation direction. Due to hard orientation i.e. ‘c’ axis aligned along the loading direction, the grain fragmentation is heterogeneous. Grain fragmentation leads to improvement in the ductility with minimal loss in strength owing to rearrangement of dislocations after annealing at 400<sup>o</sup> C for 30 minutes. By optimizing the annealing temperature (400<sup>o</sup> C for 30 minutes) bulk ultrafine grained zircaloy-2 have been produced in 85% room temperature rolled zircaloy-2.</p>
 
Publication, Distribution, Etc. Indian Journal of Engineering and Materials Sciences (IJEMS)
2022-08-25 03:20:50
 
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http://op.niscair.res.in/index.php/IJEMS/article/view/47288
 
Data Source Entry Indian Journal of Engineering and Materials Sciences (IJEMS); ##issue.vol## 29, ##issue.no## 4 (2022): IJEMS-AUGUST 2022
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJEMS/article/download/47288/465552986
 
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