scholarly journals EFFECT OF FRICTION ON THE MICROMECHANICAL PROPERTIES OF AISI 316L AUSTENITIC STEEL

2021 ◽  
Vol XXVIII (2) ◽  
pp. 34-43
Author(s):  
Daria Grabco ◽  
◽  
Constantin Pyrtsac ◽  
Daria Topal ◽  
Olga Shikimaka ◽  
...  

In this paper, we investigate the possibility of using the friction method for modifying the microstructure and mechanical properties in the near-surface regions of AISI 316L austenitic steel specimens for the purpose of its practical application. It is shown that a region of severe plastic deformation arises near the friction surface, which transforms the initial fine-grained polycrystalline steel structure into a homogenized zone consisting of a deformed structure with plastic slip bands and weakly pronounced grain boundaries. The change in the microscopic structure results in an increase in this zone of values of micromechanical characteristics, such as microhardness (H), Young's modulus (E), plasticity index (H/E) and resistance index (H3/E2). The obtained results are of interest for the potential use of AISI 316L steel in medicine.

2018 ◽  
Vol 244 ◽  
pp. 01013 ◽  
Author(s):  
Jaromir Moravec ◽  
Iva Novakova ◽  
Tomasz Kik

Joining of materials with different physical and mechanical properties is always very problematic. As one of the possibilities, there can be used method of joint creation in solid state - e.g. by the diffusion welding. With this method it is possible to joint very different materials - even metals with non-metals. Despite the unquestionable advantages of this method, there is necessary to take into account also its limits. Among of them, there is creation of brittle intermetallic phases on the boundary of materials. This occurs e.g. at creation heterogeneous joints between titanium and highly-alloyed austenitic steel. The major aim of this paper is to describe how it is possible to eliminate brittle intermetallic phases created on boundary between Ti Grade 2 and AISI 316L steel by using metal interlayers.


1994 ◽  
Vol 367 ◽  
Author(s):  
M. Hinojosa ◽  
R. Rodréguez ◽  
U. Ortiz

AbstractFractal dimension of the microstructure of AISI 316L steel (17 Cr, 12.7 Ni, 2.1 Mo, 1. 5 Mn, 0.01 C) with different degrees of strain were obtained from Richardson plots of grain boundary perimeter against magnification. Grain boundaries were revealed using conventional metallographic techniques and measurements were taken with the aid of an automatic image analizer (Quantimet 520) attached to an optical microscope. The magnifications used were 50, 100, 200, 400, and 1000X. The samples were obtained from a 4” diameter tubing, machined according to ASTM A370 standard test method and deformed to 5, 10, 15, and 20 % tensile strain. The results show that the fractal dimension of the grain boundaries changes as deformation is imparted to the material.These results suggest that fractal dimension may be used to describe microstructural evolution of metals during deformation processes.


2018 ◽  
Vol 54 (5) ◽  
pp. 508-517
Author(s):  
Milad Yazdkhasti ◽  
Sayed Ahmad Hosseini ◽  
Hamidreza Javadinejad ◽  
Hossein Zare ◽  
Mohsen Saboktakin Rizi ◽  
...  

2019 ◽  
Vol 43 (1) ◽  
pp. 51-55
Author(s):  
Bruna F. Gomes ◽  
Carlos A. Picon ◽  
Frederico A. Fernandes ◽  
Ubirajara P. Rodrigues Filho ◽  
Germano Tremiliosi-Filho

2015 ◽  
Vol 60 (3) ◽  
pp. 1795-1800 ◽  
Author(s):  
A. Szewczyk-Nykiel ◽  
M. Skałoń ◽  
J. Kazior

Abstract Present study describes results of research conducted on sinters manufactured from a powdered AISI 316L austenitic stainless steel modified with an addition of boron-rich master alloy. The main aim was to study impact of the master alloy addition on a corrosion resistance of sinters in 0.5M water solution of NaCl. In order to achieve it, a potentiodynamic method was used. Corrosion tests results were also supplemented with a microstructures of near-surface areas. Scanning electron microscope pictures of a corroded surfaces previously exposed to the corrosive environment were taken and compared. It was successful to increase the corrosion resistance of AISI 316L sinters modified with master alloy. It was also successful in particular samples to obtain a densified superficial layer not only on the sinters sintered in the hydrogen but also on sinters sintered in the vacuum. No linear correlation between presence of the densified superficial layer and the enhanced corrosion resistance was noticed.


2015 ◽  
Vol 128 (5) ◽  
pp. 923-926
Author(s):  
B. Sartowska ◽  
M. Barlak ◽  
L. Waliś ◽  
W. Starosta ◽  
J. Senatorski ◽  
...  

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