Influences of Shot Peening Parameters on Mechanical Properties and Fatigue Behavior of 316 L Steel: Experimental, Taguchi Method and Response Surface Methodology

Erfan Maleki,Okan Unal,Kazem Reza Kashyzadeh

doi:10.1007/s12540-021-01013-7

Abstract

Severe plastic deformation methods like shot peening (SP) are known as efficient surface treatments and grain refining processes which afford more effective properties in metallic materials. In the current research, a comprehensive study was carried out on SP of AISI 316 L steel. It included 42 different SP treatments with a wide range of Almen intensities of 12–27 A and various coverage degrees (100%–1500%). Several experimental tests were conducted in order to explore the microstructure, grain size, surface topography, hardness, wettability, and residual stresses of the specimens. Next, two different approaches including Taguchi method (TM), and response surface methodology (RSM) were deployed for modeling, analysis, and optimization. RSM and TM were used to examine the influence of the effective parameters. Based on the optimized results, the fatigue behavior of the selected treatments was investigated experimentally in both smooth and notched specimens.Graphical abstract

Highlights

Metallic biomaterials are extensively used in bio-applications such as pharmaceutical and textile industries and surgical implants
The lowest and highest conditions of Almen intensity indicate the capability of surface coverage within the context of layer depth and nanocrystallization
The results indicated that the shot peened surface becomes more hydrophilic, with increased wettability observed, as its severity rises above the as-received material

Summary

Introduction

Metallic biomaterials are extensively used in bio-applications such as pharmaceutical and textile industries and surgical implants. The biomaterial of stainless steel 316L is self-protected by the spontaneous formation of a thin oxide film. It has been used in wire form for neurosurgical clips, artificial hip, surgical sutures, and microvascular clips (to cure aneurysms) [6, 7]. This grade of austenitic stainless steel is applicable in producing vascular stents and Metals and Materials International (2021) 27:4418–4440 electrodes and conducting lead wires. Pulse generator housing of cardiac pacing systems is another area where stainless steel 316L is commonly used [8, 9]

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Results

Conclusion