Influence of Different Notch Insertion Methods on the Fatigue Behavior of Metastable Cr-Ni-Cu-N and AISI 316L Austenitic Stainless Steels

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-06-19 DOI:10.1111/ffe.70005

Pia Nitzsche, Michael Hauser, Alexander Liehr, Sebastian Henkel, Marco Wendler, Olena Volkova, Thomas Niendorf, Horst Biermann

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Abstract

The fatigue behavior of a metastable austenitic Cr-Ni-Cu-N steel and an austenitic AISI 316L steel was investigated with a focus on the effect of mechanically machined and formed notches, taking into account hardness and residual stress measurements. The highest fatigue strengths were achieved with the metastable austenitic steel and formed notches. Positive effects resulted from strain hardening, martensitic transformation, and residual compressive stress states. In addition, the formed notches showed a longer remaining lifetime after damage initiation. The mechanically machined notches of the metastable austenitic steel yielded pronounced martensitic transformation and very high residual compressive stresses in direct vicinity of the surface, which resulted in an improvement in the high-cycle fatigue regime. A lifetime calculation was applied that takes the residual stresses of the formed notches into account.

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不同切口插入方式对Cr-Ni-Cu-N和AISI 316L亚稳奥氏体不锈钢疲劳行为的影响

研究了一种亚稳奥氏体Cr-Ni-Cu-N钢和一种奥氏体AISI 316L钢的疲劳行为，重点研究了机械加工和成形缺口的影响，同时考虑了硬度和残余应力测量。亚稳奥氏体钢和成形缺口获得了最高的疲劳强度。应变硬化、马氏体相变和残余压应力状态产生了积极的影响。此外，形成的缺口在损伤发生后的剩余寿命更长。亚稳奥氏体钢的机械加工缺口在表面附近产生明显的马氏体转变和非常高的残余压应力，从而改善了高周疲劳状态。应用寿命计算，考虑了形成的缺口的残余应力。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.