Defining a creep-brittle materialsas one in which the load point deflection rate is a function of the crack propagation rate only and is independent of the load or crack length, the applicability of C* to correlate the crack growth rate is discussed in this letter. © 1987.

M. Kamaraj

Department of Metallurgical and Materials Engineering

Vellore Margabandhu Radhakrishnan

FRACTURE MECHANICS - MATHEMATICAL MODELS

METALS TESTING - CREEP

STAINLESS STEEL - CREEP

TITANIUM AND ALLOYS - CREEP

Crack Growth

CREEP-BRITTLE MATERIALS

METALS AND ALLOYS

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IIT Madras

Crack growth in creep-brittle materials

Materials Science and Engineering

Type 308 stainless steel containing niobium is often used in high temperature applications. Welding is normally resorted to for joining purposes in such components. The crack growth behaviour in the weldment of 308 S.S. has been studied in the temperature range of 600 to 800°C. The stress intensity factor, the COD approach and the energy rate line integral have been tried to correlate the crack growth rate. Crack growth takes places along the interphase between the austenite and the primary arm of the delta ferrite at 600°C. At higher temperatures sigma phase becomes more dominant in the crack growth process. © 1989.

Engineering Fracture Mechanics

High temperature crack growth in austenitic weld metal

Investigations have been carried out to study crack growth behaviour in type 304 stainless steel under constant-load creep conditions in the temperature range 550-650°C. At 550 and 600°C the load point deflection rate bears a unique relation to the creep crack growth rate, independent of the load. However, the results at 650°C show that the relation is load dependent. The parameters, stress intensity factor and net section stress, do not describe the crack growth rate well and there is wide scatter. The energy rate line integral C* appears to be applicable at 550 and 600°C but not at 650°C where it gives a systematic segregation of data. On the basis of a phenomenological approach a new parameter is derived which appears to correlate well with the creep crack growth at all the three temperatures investigated. This approach also provides an index which can differentiate between creep brittle and creep ductile materials. © 1987.

Effect of temperature on crack growth in type 304 stainless steel

International Journal of Fracture

A note on the creep crack growth in type 316 stainless steel

Scripta Metallurgica

Time dependent crack growth in a titanium alloy

Creep crack growth in technical alloys at elevated temperature—A review

The Physical Metallurgy of Fracture

A COMPARISON OF METHODS OF CORRELATING CREEP CRACK GROWTH

Journal of Engineering Materials and Technology

Applicability of Fracture Mechanics Parameters to Crack Propagation Under Creep Condition

Journal	Materials Science and Engineering
ISSN	00255416
Open Access	No