Variant selection in transformation texture from the {beta} to {alpha} phase in Cu-40 mass% Zn alloy

Journal Article · Fri Apr 23 04:00:00 EDT 1999 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(99)00038-5· OSTI ID:353479

Yasuda, H Y; Sakata, T; Umakoshi, Y ^[1]

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1. Osaka Univ., Suita, Osaka (Japan). Dept. of Materials Science and Engineering

The rolling texture and variant selection in texture during the phase transformation from {beta} to {alpha} in Cu-40 mass% Zn were investigated using X-ray back reflection and electron back-scatter diffraction pattern (EBSP) techniques. The rolling texture of the {beta} parent phase, before the phase transformation, was composed of {l_brace}111{r_brace}{l_angle}1{bar 1}0{r_angle}, {l_brace}001{r_brace}{l_angle}110{r_angle} and {l_brace}111{r_brace}{l_angle}{bar 1}{bar 1}2{r_angle}. Variant selection occurred during the {beta} to {alpha} phase transformation from the cold-rolled parent {beta} phase, even when the phase transformation following the Kurdjumov-Sachs relationship was controlled by a diffusion process. The variant selection was related to the Bain distortion for each {alpha} variant during the phase transformation from the {beta} to {alpha} phase. A limited set of {alpha} variants was chosen to minimize the residual stress induced in the deformed {beta} parent phase by the Bain distortion. The type of selected variants changed with the rolling texture of {beta} parent phase. The selectivity of specific variants increased and was stimulated by both annealing temperature and rolling reduction.

• OSTI ID: 353479
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 6 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DIFFUSION
ORIENTATION
RESIDUAL STRESSES
ROLLING
TEMPERATURE DEPENDENCE
TEXTURE
ZINC ALLOYS