Effect of prior austenite grain size on high temperature creep properties of CrMoV rotor steel

The creep behaviour of a 1.1Cr--1.23Mo--0.25V--0.27C steel at 650 deg C was investigated for steels having austenite grain sizes from 10-106 mu m. The minimum creep rate is inversely proportional to the prior austenite grain diameter for grain sizes < 50 mu m. A further decrease in the prior aust...

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Veröffentlicht in:	Scripta metallurgica 1987, Vol.21 (1), p.19-22
Hauptverfasser:	Kimura, Kazuhiro, Ohi, Narihito, Shimazu, Koji, Matsuo, Takashi, Tanaka, Ryohei, Kikuchi, Makoto
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Creep Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Mechanical and acoustical properties of condensed matter Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals, semimetals and alloys Metals. Metallurgy Physics Specific materials
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Zusammenfassung:	The creep behaviour of a 1.1Cr--1.23Mo--0.25V--0.27C steel at 650 deg C was investigated for steels having austenite grain sizes from 10-106 mu m. The minimum creep rate is inversely proportional to the prior austenite grain diameter for grain sizes < 50 mu m. A further decrease in the prior austenite grain size beyond 50 mu m does not lead to a further decrease in the minimum creep rate. This behaviour is related to the volume of the fully recovered zone and the presence of intergranular cracks. 10 ref.--D.O.N.
ISSN:	0036-9748
DOI:	10.1016/0036-9748(87)90399-1