Second order twinning in austenitic steel

Journal Article · Sun May 01 04:00:00 EDT 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90382-4· OSTI ID:5158818

Muellner, P; Solenthaler, C; Speidel, M O ^[1]

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1. Inst. of Metallurgy, Zuerich (Switzerland)

It is mechanical twinning which dominates the plastic deformation of austenitic steel at high degrees of cold work. The process involves the formation of second order twins (SOT), which are twins being formed within an already twinned section. In the present paper those SOT configurations are described in terms of disclinations. It is shown that the elastic energy of a deformation twin can drastically be lowered by SOT formation. Conditions of SOT formation are discussed in terms of local stress concentrations within the initial dislocation structure. SOT formation decreases the average twinning strain and increases the work hardening rate. It is concluded that SOT systems are important structure elements with respect to the mechanical properties of austenitic steel.

• OSTI ID: 5158818
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:5; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
AUSTENITIC STEELS
COLD WORKING
DATA
EXPERIMENTAL DATA
FABRICATION
HARDENING
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS WORKING
MATHEMATICAL MODELS
NUMERICAL DATA
STEELS
STRAIN HARDENING
TWINNING