The formation of twinned austenite in Fe-10Cr-10Ni-2W maraging steel

Journal Article · Sun Dec 01 00:00:00 EST 1991 · Scripta Metallurgica; (United States)

OSTI ID:5340629

Suk, J I; Hong, S H; Nam, S W ^[1]

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1. Dept. of Minerals Science and Engineering, Korea Advanced Inst. of Science and Technology, P.O. Box 150, Cheongyang, Seoul (KR)

The precipitation hardening mechanisms in high strength maraging steels have been studied in detail by many investigators, but limited information is available on the formation of austenite during aging. Some investigations have been concerned with the understanding of the effect of reverted austenite formed during aging on the mechanical properties. However, only a few investigations have been reported on the morphology and crystallographic feature of austenite. Shiang and Wayman first reported the twin-related and coupled morphology of Widmanstatten austenite plates which were frequently observed in maraging steel. In addition, Ameyama et al. reported the morphology and crystallographic features of austenite formed in ferrite grain during aging in a two-phase stainless steel, and found that each side of the austenite pair of twins satisfies the Kurdjumov-Sachs (K-S) orientation relationship with the parent phase. The morphology and crystallographic features of the reverted austenite formed during aging of Fe-10Cr-10Ni-2W stainless maraging steel have been investigated in this paper. The major strengthening precipitate in Fe-10Cr-10Ni-2W maraging steels has been identified as the rod-shaped {eta}-Ni{sub 3}Ti phase in our previous study. The peculiar morphology of the austenite, i.e., twinned austenite, also has been found in our studies of maraging steel in the Fe-10Cr-10Ni-2W lath martensite. In addition, computer simulation of the diffraction pattern is used to confirm the orientation relationships, such as the Kurdjumov-Sachs (K-S) relationship, the Nishiyama-Wasserman (N-W) relationship and the twin relationship by comparisons with the experimentaly observed results.

• OSTI ID: 5340629
• Journal Information: Scripta Metallurgica; (United States), Vol. 25:12; ISSN 0036-9748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
PHASE STUDIES
STEELS
PRECIPITATION
AUSTENITE
CHROMIUM ADDITIONS
COMPUTERIZED SIMULATION
CRYSTALLOGRAPHY
GRAIN ORIENTATION
MECHANICAL PROPERTIES
NICKEL ADDITIONS
NICKEL BASE ALLOYS
TITANIUM ALLOYS
TUNGSTEN ADDITIONS
TWINNING
X-RAY DIFFRACTION
ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
IRON ALLOYS
MICROSTRUCTURE
NICKEL ALLOYS
ORIENTATION
SCATTERING
SEPARATION PROCESSES
SIMULATION
TUNGSTEN ALLOYS
360102* - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties