Work

Crystallographic Relationships between .DELTA.-Ferrite and .GAMMA.-Austenite during Unidirectional Solidification of Fe-Cr-Ni Alloys.

Year: 2000

Type: article

Abstract: The crystallographic orientation relationships between δ-ferrite and γ-austenite during unidirectional solidi-fication of Fe–Cr–Ni alloys have been evaluated with EBSPs (Electron Back Scattering Patterns). The preferre dorientation relationship between δ and γ agrees with the Kurdjumov–Sachs (K-S) relationship in both rod and lamellar eutectic structures obtained by Bridgman experiments. It is thought that the preferred relationship is developed by nucleation of secondary phase. The orientation relationship between primary γ-dendrites and primary δ-dendrites during dissimilar alloy welding (primary γ to δ-dendrites) by a laser experiment also agrees with the K-S relationship. The transition from primary γ to δ-dendrites is thought to be controlled by heterogeneous nucleation of ferrite at the growing γ-dendrite front. It is suggested that the nucleation also plays an important role in the microstructure formation.

Source: ISIJ International

DOI: 10.2355/isijinternational.40.677

Authors: Shigeo Fukumoto, Toshimitsu Okane, Takateru Umeda, Wilfried Kurz

Institutions: École Polytechnique Fédérale de Lausanne, The University of Tokyo

Language: English

Topic: Solidification and crystal growth phenomena

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $700

OpenAlex ID: W2045450220

FWCI: 0.265

Cites:

Cited by: 24

Related to: 10