ANOMALOUS AMPLITUDE DEPENDENT DISLOCATION DAMPING ASSOCIATED WITH ANHARMONIC OSCILLATIONS OF A COULOMBIC KINK CHAIN IN THE NONLINEAR DISSIPATIVE ATMOSPHERE OF IMPURITY ATOMS

OGURTANI T.

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, cilt.128, sa.1, ss.69-81, 1991 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 128 Sayı: 1
  • Basım Tarihi: 1991
  • Doi Numarası: 10.1002/pssa.2211280108
  • Dergi Adı: PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Compendex, INSPEC
  • Sayfa Sayıları: ss.69-81
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The effects of the anharmonic interaction of the Coulombic kink chain on the strength and the position of the cold-work internal friction peaks associated with the nonlinearly power dissipating impurity atoms are investigated by a novel numerical simulation of the related discrete mathematical macro-model. The present macroscopic model of dislocation damping which relies heavily on the microscopic theory of kink-interstitial interactions shows very strong anomalous strain amplitude as well as the bias stress dependence of internal friction peaks in accord with the experimental observations. Also it is deduced that the strength of pinning of the kinks at the ends of the chain can have profound influence on the strength and the position of the dislocation damping peaks.