The role of coincident site lattice boundaries during selective growth in interstitial-free steels

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Metallurgical Transactions, A

DOI:https://doi.org/10.1007/BF02651872· OSTI ID:367286

Gangli, P ^[1]; Kestens, L ^[2]; Jonas, J J ^[3]

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1. FE2000 Inc., Vaudreuil, Quebec (Canada)
2. Center for Research in Metallurgy, Gent (Belgium). Dept. of Flat Rolling
3. McGill Univ., Montreal, Quebec (Canada). Dept. of Metallurgical Engineering

The development of textures in interstitial-free (IF) steels as a result of annealing after cold rolling is described with the help of a combined nucleation and growth model. Nucleation is simulated by assuming that high stored energy nucleation occurs preferentially in high Taylor factor regions in the 75 to 85 pct cold reduced materials. Growth of the nuclei then takes place by means of {Sigma} <110> type as well as by {Sigma} 7 <111> type coincident site lattice (CSL) transformations. Of the six symmetrically equivalent <110> transformation axes, only the ones near the maximum shear stress poles are assumed to operate. The effects of the migration of individual {Sigma} 9, {Sigma} 11, {Sigma} 17c, {Sigma} 19a, {Sigma} 33a, and {Sigma} 33c <110> boundaries are analyzed. Their relative mobilities and contributions to the final texture are deduced by matching the simulated and experimental preferred orientations using a least-squares method. On the basis of experimental results for two steels, the various boundary types are observed to have the following mobility ratios: {Sigma} 33a:12, {Sigma} 19a:4, {Sigma} 9:1, {Sigma} 33c:1, and {Sigma} 17c:2.

• Sponsoring Organization: USDOE
• OSTI ID: 367286
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 8 Vol. 27; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CHEMICAL COMPOSITION
COLD WORKING
GRAIN BOUNDARIES
GRAIN GROWTH
GRAIN ORIENTATION
NUCLEATION
RECRYSTALLIZATION
ROLLING
STEELS
TEXTURE