Effects of Surface Softening on the Mechanical Properties of an AISI 316L Stainless Steel under Cyclic Loading

The effects of surface softening on fatigue behavior of AISI 316L stainless steel were investigated. Using cold-rolling and electromagnetic induction heating treatment, a gradient structure was fabricated on AISI 316L stainless steel within which the grain size decreased exponentially from micrometers to nanometers to mimic the surface softening. Stress-controlled fatigue tests were applied to both the gradient and homogeneous structures. Compared with the homogeneous sample, surface softening had no evident effect on fatigue behavior when the stress amplitude was greater than 400 MPa, but significantly deteriorated the fatigue behavior at stress amplitude ≤400 MPa. At high-stress amplitude, fatigue behavior is dominated by crack propagation. When the stress amplitude is lowered, strength reduction and stress concentration caused by surface softening accelerate crack initiation and propagation, resulting in an inferior fatigue behavior.

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On the fatigue behavior of an AISI 316L stainless steel coated with a PVD TiN deposit

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2003.07.003 ◽

2004 ◽

Vol 182 (2-3) ◽

pp. 276-286 ◽

Cited By ~ 60

Author(s):

E.S Puchi-Cabrera ◽

F Matı́nez ◽

I Herrera ◽

J.A Berrı́os ◽

S Dixit ◽

...

Keyword(s):

Stainless Steel ◽

316L Stainless Steel ◽

Fatigue Behavior ◽

Aisi 316L ◽

Aisi 316L Stainless Steel ◽

Tin Deposit

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Corrosion fatigue behavior of Al-5Mg coated AISI 316L stainless steel in sodium chloride environments under bending load

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-04-2018-1924 ◽

2019 ◽

Vol 66 (1) ◽

pp. 34-39 ◽

Cited By ~ 1

Author(s):

Mustafa Öcal ◽

Recep Sadeler

Keyword(s):

Stainless Steel ◽

Sodium Chloride ◽

316L Stainless Steel ◽

Fatigue Behavior ◽

Base Material ◽

Ambient Air ◽

Aisi 316L ◽

Aisi 316L Stainless Steel ◽

Content Type ◽

Bending Load

Purpose The purpose of this study is to describe the environmentally assisted cracking (EAC) of AISI 316L stainless steel as bare and coated cases in several corrosion environments. The main purpose of this study is to extend the lifespan of 316L material under corrosive fatigue in sodium chloride environments. Design/methodology/approach Fatigue tests carried out by using a Schenk type plane bending fatigue machine made by Tokyokoki Co. A scanning electron microscope (SEM) was used to observe the fracture surfaces and tested specimen surfaces. The micro-Vickers hardness of specimens was measured by using a PC-controlled Buehler–Omnimet tester. Findings Under reciprocating bending condition (R = −1) the behavior of 316L SS bare samples and 316L SS coated with Al-5%Mg samples were investigated comparatively at room temperature in ambient air and in several corrosion solutions. The results obtained from the data showed that Al-5Mg coating procedure significantly stabilized the 316L SS even in the most aggressive environment 5 per cent NaCl solution as compared with bare samples. Originality/value Al-5Mg coating showed a stable structure under the corrosion liquids used in the experiments. The coating material served as a stable barrier between the base material and the corrosion fluid, thus ensuring a tightness even in long-term tests below the endurance limit.

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