EFFECT OF ALLOYING ELEMENTS ON THE SEGREGATION OF IMPURITY ATOMS AND INTERGRANULAR FRACTURE IN IRON.

Hiroshi Kimura, Kenji Abiko, Shigeru Suzuki, Minoru Obata, Jun ichi Kumagai, Hidetaka Kimura

Research output: Contribution to conferencePaperpeer-review

10 Citations (Scopus)

Abstract

Investigations have been made on the effects of alloying (carbon, molybdenum and nickel) on the grain boundary segregation of phosphorus and on the phosphorus-induced intergranular fracture (IGF) in alpha -iron. The degree of phosphorus segregation is decreased by the addition of carbon through the site competition mechanism, but is unaffected by molybdenum and nickel as far as the alloying elements are in the solid solution. These results with molybdenum and nickel disagree with the current consideration for the role of these elements in the temper-embrittlement in low alloy steels. Carbon prevents IGF and increases the toughness of iron containing phosphorus by decreasing the phosphorus segregation and by increasing the grain boundary cohesion of iron independently of phosphorus. Molybdenum also prevents IGF and increases the toughness. This effect is due to the interaction of molybdenum with phosphorus at grain boundaries to decrease the effect of phosphorus.

Original languageEnglish
Pages53-62
Number of pages10
Publication statusPublished - 1986 Dec 1

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'EFFECT OF ALLOYING ELEMENTS ON THE SEGREGATION OF IMPURITY ATOMS AND INTERGRANULAR FRACTURE IN IRON.'. Together they form a unique fingerprint.

Cite this