Open AccessThe two internal friction peaks in rapidly cooled Fe71Al29 alloy*
Author(s) -
Qiang Wang,
Zhou Zheng-Cun,
Han Fu-Sheng
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3829
Subject(s) - torsion pendulum clock , alloy , materials science , internal friction , tetrahedron , relaxation (psychology) , condensed matter physics , k nearest neighbors algorithm , molecular physics , crystallography , atomic physics , physics , composite material , chemistry , psychology , social psychology , quantum mechanics , artificial intelligence , computer science
Three internal friction peaks were found around 180℃ (termed as P1),340℃ (termed as P2) and 510℃(termed as P3) in rapidly cooled Fe71Al29 alloy,while only the P3 peak can be observed in slowly cooled sp ecimens.Only the P1 and P2 peaks were investigated using a computer- controlled inverted torsion pendulum in the present study.The P1 and P2 peaks in air-cooled specimens disappear during cooling or after long term ag eing at 350℃.They decline even disappear with increasing ageing time.Both the P1 and P2 peaks have relaxation features and their activation energy values are H1=103±008eVfor the P1 peak and H2=164±005eV for the P2 peak.It is suggested that P1 peak originates from the nearestneighbor jumps of Al atoms within tetrahedral lattices and P2 peak from the next-nearest-neighbor jumps of Al atoms within tetrahedral lattices in quenched alloys.