Monitoring the Microstructural Evolution in Spheroidized Steels by Magnetic Barkhausen Noise Measurements

DAVUT K., GÜR C. H.

JOURNAL OF NONDESTRUCTIVE EVALUATION, cilt.29, sa.4, ss.241-247, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 4
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1007/s10921-010-0082-4
  • Dergi Adı: JOURNAL OF NONDESTRUCTIVE EVALUATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.241-247
  • Anahtar Kelimeler: Steel, Spheroidizing, Microstructure, Magnetic Barkhausen Noise, PEARLITE SPHEROIDIZATION, NONDESTRUCTIVE EVALUATION, FERROMAGNETIC MATERIALS, CARBON-STEELS, DEFORMATION, EMISSION, HARDNESS, IRON
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The aim of this study is to monitor nondestructively the degree of spheroidization in steels by Magnetic Barkhausen Noise (MBN) method. Various series of specimens consisting of either lamellar pearlite or partially/completely spheroidized carbides were produced from AISI 1060 steel by appropriate heat treatments. All specimens were characterized by metallographic examinations, hardness and MBN measurements. The results show that MBN signals are very sensitive to the variations in the microstructure caused by the spheroidizing heat treatment. The change of microstructure, from coarse lamellar carbides to uniformly dispersed spherical carbides in ferrite matrix, is reflected as higher Barkhausen activity due to less effective pinning of domain walls.