High Temperature, Low Cycle Fatigue Characterization of P91 Weld and Heat Affected Zone Material

被引：23

作者：

Farragher, T. P. ^{[1
]}

Scully, S. ^{[2
]}

O'Dowd, N. P. ^{[3
]}

Hyde, C. J. ^{[4
]}

Leen, S. B. ^{[1
]}

机构：

[1] NUI Galway, Coll Engn & Informat, Galway, Ireland

[2] ESB Energy Int, ESB Head Off, Dublin 2, Ireland

[3] Univ Limerick, Dept Mech Aeronaut & Biomed Engn, Mat & Surface Sci Inst, Limerick, Ireland

[4] Univ Nottingham, Dept Mech Mat & Mfg Engn, Nottingham NG7 2RD, England

来源：

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2014年 / 136卷 / 02期

基金：

爱尔兰科学基金会;

关键词：

MARTENSITIC STEEL; CREEP-FATIGUE; HYSTERESIS LOOPS; BEHAVIOR; DAMAGE; JOINTS; METAL;

D O I：

10.1115/1.4025943

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The high temperature low cycle fatigue behavior of P91 weld metal (WM) and weld joints (cross-weld) is presented. Strain-controlled tests have been carried out at 400 degrees C and 500 degrees C. The cyclic behavior of the weld material (WM) and cross-weld (CW) specimens are compared with previously published base material (BM) tests. The weld material is shown to give a significantly harder and stiffer stress-strain response than both the base material and the cross-weld material. The cross-weld tests exhibited a cyclic stress-strain response, which was similar to that of the base material. All specimen types exhibited cyclic softening but the degree of softening exhibited by the cross-weld specimens was lower than that of the base material and all-weld tests. Finite element models of the base metal, weld metal and cross-weld test specimens are developed and employed for identification of the cyclic viscoplasticity material parameters. Heat affected zone (HAZ) cracking was observed for the cross-weld tests.

引用

页数：10

共 29 条

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