Inner Surface Migration during the Internal Crack Healing in 45 Steel

Abstract:

Article Preview

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 and 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:

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.