Estimation of Dislocation Concentration in Plastically Deformed FeCrNi Alloy by Positron Annihilation Lifetime

Estimation of Dislocation Concentration in Plastically Deformed FeCrNi Alloy by Positron Annihilation Lifetime

Dislocations would be induced after plastic deformation, which might change the mechanical properties of solids. FeCrNi austenitic model alloy and its Mo-diluted alloy were cold rolled with different degree of thickness reduction. Positrons are sensitive to point defects, which are easily trapped an...

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Veröffentlicht in:Diffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum Defect and diffusion forum, 2017-03, Vol.373, p.162-166
Hauptverfasser: Lu, Er Yang, Jin, Shuo Xue, Zhang, Peng, Cao, Xing Zhong, Wang, Bao Yi, Gong, Yi Hao, Yu, Run Sheng
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container_title Diffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum
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creator Lu, Er Yang
Jin, Shuo Xue
Zhang, Peng
Cao, Xing Zhong
Wang, Bao Yi
Gong, Yi Hao
Yu, Run Sheng
description Dislocations would be induced after plastic deformation, which might change the mechanical properties of solids. FeCrNi austenitic model alloy and its Mo-diluted alloy were cold rolled with different degree of thickness reduction. Positrons are sensitive to point defects, which are easily trapped and annihilated around the trapping sites. The mean positron lifetimes have been used to estimate the average dislocation concentration in solids. Meanwhile, the trapping efficiency μ was calculated from the lifetime results. The trapping efficiency value is estimated about 3.31×10-7 cm3s-1 for FeCrNi alloy and 3.31×10-7 cm3s-1 for Mo-diluted alloy, respectively. The increment of the hardness value during plastic deformation is related to the increase of the dislocation density and dislocation pile up in solids.
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title Estimation of Dislocation Concentration in Plastically Deformed FeCrNi Alloy by Positron Annihilation Lifetime
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