Microstructure Evolution in a 9%Cr Heat Resistant Steel during Creep Tests

被引：5

作者：

Skorobogatykh, V. ^{[1
]}

Schenkova, I. ^{[1
]}

Dudko, V. ^{[2
]}

Belyakov, A. ^{[2
]}

Kaibyshev, R. ^{[2
]}

机构：

[1] Cent Res Inst Machine Bldg Technol, Sharikopodshipnikovskaya 4, Moscow 115088, Russia

[2] Belarusian State Univ, Belgorod 306015, Russia

来源：

THERMEC 2009, PTS 1-4 | 2010年 / 638-642卷

关键词：

Heat resistant steel; tempered martensite; creep test; carbide coarsening; microstructure evolution;

D O I：

10.4028/www.scientific.net/MSF.638-642.2315

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dynamic structural changes during creep tests for about 10(3) hours at 600 and 650 degrees C were investigated in a P92-type 9%Cr martensitic heat resistant steel The structural changes are characterised by the development of relatively large equiaxed subgrains with relatively low dislocation densities in place of initial martensite laths. The coarsening of substructure was accompanied by a growth of second phase precipitates. The final grain/subgrain sizes and dislocation densities evolved after the creep tests were in rough correlation with applied stresses, i e larger (sub)grains developed under lower stresses. The structural mechanism responsible for microstructure evolution was considered as a kind of continuous dynamic recrystallization.

引用

页码：2315 / +

页数：2

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