Paper Title:
Inner Surface Migration during the Internal Crack Healing in 45 Steel
  Abstract

Many cracks can occur in heavy forging as a result of inherent defects of heavy ingot and forging process. According to the results of current research, internal crack of metallic material can heal under high temperature. In order to get to the bottom of internal crack healing in heavy forgings, some 45 steel samples containing internal crack were normalized at higher temperature than normal. The phenomena show that new ferrite grains nucleate and grow up on the crack surfaces during the crack healing, and the ferrite grains nucleation is universal but selective on crack surfaces. The relationship of atom diffusion and ferrite grain nucleation and their actions on crack surface migration will be discussed and expounded, and that proves that ferrite grain nucleation and growth will accelerate crack healing.

  Info
Periodical
Materials Science Forum (Volumes 628-629)
Edited by
Dongming Guo, Jun Wang, Zhenyuan Jia, Renke Kang, Hang Gao, and Xuyue Wang
Pages
547-552
DOI
10.4028/www.scientific.net/MSF.628-629.547
Citation
F.Y. Meng, S.M. Nie, "Inner Surface Migration during the Internal Crack Healing in 45 Steel", Materials Science Forum, Vols. 628-629, pp. 547-552, 2009
Online since
August 2009
Authors
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Price
$32.00
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