Fatigue Life Improvement of the High Strength Steel Welded Joints by Ultrasonic Impact Peening

被引：36

作者：

Lago, Jan ^{[1
]}

Trsko, Libor ^{[2
]}

Jambor, Michal ^{[3
]}

Novy, Frantisek ^{[3
]}

Bokuvka, Otakar ^{[3
]}

Mician, Milos ^{[3
]}

Pastorek, Filip ^{[2
]}

机构：

[1] LAGO Nastrojaren Sro, Valke Rovne 1571, Valke Rovne 01362, Slovakia

[2] Univ Zilina, Res Ctr, Univ 8215-1, Zilina 01026, Slovakia

[3] Univ Zilina, Fac Mech Engn, Univ 8215-1, Zilina 01026, Slovakia

来源：

METALS | 2019年 / 9卷 / 06期

关键词：

ultrasonic impact peening; high strength low alloy steel; fatigue life; residual stresses; severe plastic deformation; HIGH-CYCLE FATIGUE; SURFACE NANOCRYSTALLIZATION; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.3390/met9060619

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrasonic impact peening was applied on welded joints manufactured from Strenx 700 MC high strength low alloy steel with the aim to improve the fatigue properties. Three different surface treatment parameters were tested, which resulted in transformation of the near-surface tensile residual stresses in the weld metal and heat affected zone to compressive residual stress field, while maximal values from -400 MPa up to -800 MPa were reached. The highest fatigue life improvement was reached by the double peening with the 85 N contact force, where the fatigue limit for N = 10(8) cycles increased from 370 MPa to 410 MPa.

引用

页数：15

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