On the transgranular type of tempered martensite embrittlement
- Kookmin Univ., Seoul (Korea, Republic of). Dept. of Metallurgy and Materials Engineering
Martensitic alloy steels are subject to tempering because of their low toughness in the as-quenched state. When tempered in the range of 250--400 C, however, the toughness drops in spite of the decrease in strength with increasing the tempering temperature. This phenomenon is referred to as tempered martensite embrittlement (TME). TME can be classified into two types according to the fracture mode; intergranular and transgranular TME. The transgranular type was suggested to be caused by the formation of coarse carbides at the lath boundaries following the decomposition of retained austenite. In this study, the transgranular type of TME has been analyzed in terms of impact toughness, fracture behavior and microstructure on isothermal tempering. The experimental alloy systems chosen are the Mo and MoW steels in which alloying elements, Mo and W, may decrease the intrinsic toughness and thus produce easy transgranular brittle fracture.
- OSTI ID:
- 5263807
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:9; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of tempered martensite microstructure and embrittlement by acoustic and/magnetic Barkhausen signal measurement
Retained austenite and tempered martensite embrittlement
Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
DATA
ELEMENTS
EMBRITTLEMENT
EXPERIMENTAL DATA
FRACTURE PROPERTIES
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MARTENSITIC STEELS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MOLYBDENUM
NUMERICAL DATA
STEELS
TRANSITION ELEMENTS
TUNGSTEN