Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel

被引：49

作者：

Karr, Ulrike ^{[1
]}

Schuller, Reinhard ^{[1
]}

Fitzka, Michael ^{[1
]}

Schoenbauer, Bernd ^{[1
]}

Duc Tran ^{[2
]}

Pennings, Bert ^{[2
]}

Mayer, Herwig ^{[1
]}

机构：

[1] BOKU, Inst Phys & Mat Sci, Peter Jordan Str 82, A-1190 Vienna, Austria

[2] Bosch Transmiss Technol, Adv Engn, Dr Hub van Doorneweg 120,POB 500, NL-5000 AM Tilburg, Netherlands

来源：

JOURNAL OF MATERIALS SCIENCE | 2017年 / 52卷 / 10期

关键词：

HIGH-STRENGTH STEELS; REGIME N-GREATER-THAN-10(7) CYCLES; LIFE; MECHANISM; BEHAVIOR; FAILURE; MICROSTRUCTURE; STRESSES; DEFECT; DAMAGE;

D O I：

10.1007/s10853-017-0831-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The very high cycle fatigue (VHCF) properties of four 18Ni maraging steels were investigated. Ultrasonic fatigue tests were performed on thin sheets with nitrided surfaces at load ratio R = 0.1. Traditional maraging steel containing Ti (material A) showed crack initiation at TiN-inclusions. The elimination of Ti and the increase in Co content (material B) lead to preferential crack initiation at aluminate-inclusions. Aluminate-inclusions are less damaging than TiN-inclusions, and material B shows higher VHCF strength than material A. A further developed maraging steel (material C) with reduced Co content that is compensated for by alloying with Al showed crack initiation at aluminate- as well as at Zr(N,C)-inclusions. Zr(N,C)-inclusions are more damaging than aluminate-inclusions and less damaging than TiN-inclusions. The highest VHCF strength was found for a recently developed alloy with further increased Al content (material D). In addition to inclusion-initiated fracture, this material showed shear mode crack initiation in the nitrided zone at the surface.

引用

页码：5954 / 5967

页数：14

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