Correlation between creep and hot tensile behaviour for 2.25Cr-1Mo steel from 500 °C to 700 °C Part 1: An Assessment According to usual Relations Involving stress, temperature, strain rate and Rupture Time

被引：15

作者：

Bueno, L. O. ^{[1
]}

Sobrinho, J. F. R. ^{[2
]}

机构：

[1] Lab Fluencia Met DEMa UFSCar, BR-13565905 Sao Carlos, SP, Brazil

[2] CEFET PI, BR-64000040 Teresina, PI, Brazil

来源：

MATERIA-RIO DE JANEIRO | 2012年 / 17卷 / 03期

关键词：

Cr-Mo ferritic steels; creep data; hot tensile data; strain rate sensitivity; Norton relation; Monkman-Grant relation;

D O I：

10.1590/S1517-70762012000300007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot tensile and creep tests were carried out on 2.25Cr- 1Mo steel at 9 temperature levels between 500 degrees C and 700 degrees C, using 5 different crosshead speeds, namely: 0.01 - 0.25 - 1.0 - 5.0 and 20 mm/min, and 17 levels of stress for creep from 34 to 414 MPa. The experimental work involved the analysis of data from 30 hot tensile tests and 50 constant load creep tests, with rupture times varying from 2 to about 1300 hours. Each of these set of data were analyzed separately according to their own methodologies, but an attempt was made to find a correlation between them. A new criteria is proposed for converting hot tensile data to creep data, which makes possible the analysis of the two kinds of results according to the Norton, Zener-Hollomon, Arrhenius and Monkman-Grant relations. The results shows remarkable compatibility, indicating consistent transition from the region of power-law to exponential creep behaviour.

引用

页码：1098 / 1108

页数：11

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