Investigation of crystallographic slip in polycrystalline Fe{sub 3}Al using slip trace measurement and microtexture determination

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(96)00373-4· OSTI ID:524540

Raabe, D; Keichel, J; Gottstein, G ^[1]

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1. RWTH, Aachen (Germany). Inst. fuer Metallkunde und Metallphysik

An intermetallic Fe{sub 72}Al{sub 28} alloy (doped with Cr, Zr, Mo, and C) with an imperfectly ordered B2 crystal structure was rolled at 830--860 K to {epsilon} = 20%. To investigate crystallographic slip an etching technique was developed which allowed slip traces to be determined in grain interiors rather than at the sample surface. To derive the prevalent glide systems both the slip traces and the corresponding orientations were determined in grain scale. Three types of slip systems were identified, namely {l_brace}110{r_brace}<111>, {l_brace}112{r_brace}<111>, and {l_brace}123{r_brace}<111>. However, the slip traces produced by {l_brace}123{r_brace}<111> systems appeared wavy and were interpreted in terms of macroscopic or effective rather than crystallographic slip. The critical resolved shear stress ratio of the slip systems involved was fitted from experiment using a Relaxed Constraints Taylor model. The best correspondence between predicted and experimentally observed slip systems was attained for a critical resolver shear stress ratio of {tau}{sub {l_brace}110{r_brace}}/{tau}{sub {l_brace}112{r_brace}} = 1.05/1.0.

• OSTI ID: 524540
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CORRELATIONS
DEFORMATION
DOPED MATERIALS
ETCHING
GRAIN ORIENTATION
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MICROSTRUCTURE
PREDICTION EQUATIONS
SLIP