Creep crack growth in cold-formed C–Mn steel at 360°C

Neate, G.J.

doi:10.1179/026708387790123151

Cited by 8 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The point of departure of the present hypothesis on nitrogen enhancing the slow growth of cracks in C–Mn steel, at constant load at temperatures below the creep range, i.e. at temperatures between 310 and 420 °C, is the experience of the effects of various external factors on such cracking [2–7 ]. Nitrogen has been assumed to play an important role in this context in view of its known attraction to dislocations, impeding their movement, and hence reducing the ductility of steels containing this element.…”

Section: General Backgroundmentioning

confidence: 99%

A COMMENTARY ON THE ROLE OF NITROGEN IN ENHANCING SLOW CRACK GROWTH IN C–Mn STEEL

Östberg

1998

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

More than two decades ago, cracks growing slowly at temperatures below the creep range were first discovered in tubing of C–Mn steel in thermal power plants. So far, no completely satisfactory explanation for such behaviour has been found. Available information on the influence of nitrogen on deformation and cracking of C–Mn steel under prevailing conditions, however, seems to indicate that this element may play a critical role in the failure in question. It appears that a mechanism involving both metallurgical and mechanical processes has to be considered more comprehensively and in a more integrated manner than is usually the case.

show abstract

Section: General Backgroundmentioning

confidence: 99%

A COMMENTARY ON THE ROLE OF NITROGEN IN ENHANCING SLOW CRACK GROWTH IN C–Mn STEEL

Östberg

1998

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…They have been observed after service lives from 8000 to 100 000 h in conventional fossil fired power plants at around 360°C [1][2][3][4]. Investigations showed that crack growth had taken place a long period of time before failure.…”

Section: Introductionmentioning

confidence: 99%

Low temperature creep crack growth in low alloy reactor pressure vessel steel

Sandström

Seitisleam

2005

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…Collectively, these have led to the identification of 'creep damage', its character and development. Numerous papers [128][129][130][131][132][133][134][135] have examined these features and they have necessarily invoked extensive understanding of many areas of metallurgy. With the passage of time, investigations on creep have intertwined with other phenomena.…”

mentioning

confidence: 99%

Reflections on creep: A review of the mst archive

2013

Materials Science and Technology

View full text Add to dashboard Cite

Amongst many themes embedded in Materials Science and Technology (MST), the phenomenon of creep has remained a significant component, seamlessly continuing from the journals through which MST was directly descended. The Journal of the Iron and Steel Institute (JISI), from its founding in 1869, recorded procedures to manufacture steels to withstand arduous conditions to improve the performance of furnaces and engines. The problem of creep was identified and its exploration included its occurrence in non-ferrous metals and alloys with results on these published in the Journal of the Institute of Metals (JIM). The sensitivity of creep to materials' processing as well as to chemical composition was soon apparent. The brief commentary here outlines some of the main features in this area as reported by the successive line of journals, but it gives no more than a taste the wealth of information, ideas and proposals they contain.Early studies were necessarily empirical but became more focused by progressively controlling parameters that led to variable results. The shape of the strain versus time curve at constant uniaxial stress and temperature was a prominent consideration with formulae proposed for its description. 1 Such attention has continued with increasing sophistication 2 aided by the data processing power of computers. Experimental results and the capability of their extrapolation are vital ingredients in attempting to make realistic prediction of long term behaviour to times greatly in excess of those feasible in laboratory testing. Within relatively narrow ranges of material composition and microstructure and of imposed conditions such efforts have made valuable progress but the high sensitivity of the creep process to both internal and external variables indicates that unique relationships to cover a wider range of conditions are unlikely to emerge in a simple, precise and accurate form.Many contributions have aimed at interpretation of creep behaviour. [16][17][18][19] These were aided by substantial support for basic scientific research in the post-war years that encouraged studies 20-24 on metals with well characterised microstructures and accurately known levels of impurity. Much of this work was nevertheless driven by practical and commercial needs, urgently seeking data and better understanding of the behaviour of materials under severe conditions and in entirely new environments such as those inherent in nuclear power generation. Papers concerned with these areas have necessarily invoked extensive understanding of broad areas of metallurgy. As well as enhancing surface reactions, elevated temperatures allow precipitates to coarsen, grain boundaries to migrate and shear, impurities to segregate, dislocations to climb as well as glide, vacancies to be created, diffuse, condense and be absorbed.

show abstract

Creep crack growth in cold-formed C–Mn steel at 360°C

Cited by 8 publications

References 6 publications

A COMMENTARY ON THE ROLE OF NITROGEN IN ENHANCING SLOW CRACK GROWTH IN C–Mn STEEL

A COMMENTARY ON THE ROLE OF NITROGEN IN ENHANCING SLOW CRACK GROWTH IN C–Mn STEEL

Low temperature creep crack growth in low alloy reactor pressure vessel steel

Reflections on creep: A review of the mst archive

Contact Info

Product

Resources

About