Effects of Nitriding and Shot Peening treatments and Stress Concentration on the Fatigue Strength of AISI 4340 steel

2001 ◽  
Author(s):  
Célio P. Siqueira ◽  
Celso P. M. Pereira ◽  
Marcelino P. Nascimento ◽  
Herman J. C. Voorwald ◽  
Renato C. Souza
Keyword(s):  
Fatigue Strength ◽  
Stress Concentration ◽  
Shot Peening ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Improvement in the fatigue strength of chromium electroplated AISI 4340 steel by shot peening

2009 ◽  
Vol 32 (2) ◽  
pp. 97-104 ◽  
Author(s):  
H. J. C. VOORWALD ◽  
M. P. SILVA ◽  
M. Y. P. COSTA ◽  
M. O. H. CIOFFI
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

scholarly journals Evaluation of WC-10Ni thermal spray coating with shot peening on the fatigue strength of AISI 4340 steel

2010 ◽  
Vol 2 (1) ◽  
pp. 649-656 ◽  
Author(s):  
G.S. Junior ◽  
H.J.C. Voorwald ◽  
L.F.S. Vieira ◽  
M.O.H. Cioffi ◽  
R.G. Bonora
Keyword(s):  
Fatigue Strength ◽  
Thermal Spray ◽  
Shot Peening ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Effects of Extremes of Hardness and Mean Stress on Fatigue of AISI 4340 Steel in Bending and Torsion

1989 ◽  
Vol 111 (2) ◽  
pp. 119-122 ◽  
Author(s):  
W. N. Findley
Keyword(s):  
Fatigue Strength ◽  
Linear Relation ◽  
Brinell Hardness ◽  
Fatigue Tests ◽  
Mean Stress ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Experiments are reported for fatigue tests in bending and in torsion at hardness levels from fully annealed to fully hard and super quenched. Results indicate a linear relation between fatigue strength and Brinell hardness. The relation between bending and torsion and the effects of mean stress and size are also examined.

An improvement in fatigue behavior of AISI 4340 steel by shot peening and ultrasonic nanocrystal surface modification

2020 ◽  
Vol 791 ◽  
pp. 139752 ◽  
Author(s):  
Ruslan Karimbaev ◽  
Young-Sik Pyun ◽  
Erfan Maleki ◽  
Okan Unal ◽  
Auezhan Amanov
Keyword(s):  
Surface Modification ◽  
Shot Peening ◽  
Fatigue Behavior ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Combined Bending-Torsion Fatigue Reliability of AISI 4340 Steel Shafting With Kt = 2.34

1975 ◽  
Vol 97 (2) ◽  
pp. 748-760 ◽  
Author(s):  
Dimitri Kececioglu ◽  
Louie B. Chester ◽  
Thomas M. Dodge
Keyword(s):  
Stress Concentration ◽  
Fatigue Reliability ◽  
Aisi 4340 Steel ◽  
The Third ◽  
Failure Data ◽  
4340 Steel ◽  
Bending Loads ◽  
Failure Theories ◽  
Cycles To Failure ◽  
Aisi 4340

Results generated by three, unique fatigue reliability research machines which can apply reversed bending loads combined with steady torque are presented. Six-inch long, AISI 4340 steel, grooved specimens with a stress concentration factor of 2.34 and RC 35/40 hardness were subjected to various combinations of these loads and cycled to failure. The generated cycles-to-failure and stress-to-failure data are statistically analyzed to develop distributional S-N and Goodman diagrams. Various failure theories are investigated to determine which one represents the data best. The effect of the groove and of the various combined bending-torsion loads on the S-N and Goodman diagrams are determined. Three design applications are presented. The third one illustrates the weight savings that may be achieved by designing for reliability.

scholarly journals Optimization of Process Parameters of Shot Peening for AISI 4340 Steel

2018 ◽  
Vol 7 (1) ◽  
pp. 1-4
Author(s):  
Supinderjit Singh ◽  
Ankur Gil ◽  
Dhiraj Parkash Dhiman
Keyword(s):  
Surface Modification ◽  
Process Parameters ◽  
Shot Peening ◽  
Surface Hardness ◽  
Target Surface ◽  
Industrial Applications ◽  
Air Pressure ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Surface modification is one of the important requirements of various components used in industrial applications. Shot peening is one of the surface modification techniques which is being widely used in automotive industry to enhance fatigue life and surface characterises of mechanical parts. In this thesis, the development of experimental set up for shot peening has been undertaken to investigate the effect of prominent process parameter on surface characterises of a given target surface. The major objective of this work is to investigate the effect of three prominent process parameters, namely Air pressure, Temperature of target surface and Stand-off distance on surface characteristics of AISI 4340 steel. The work material has been chosen keeping in view its applications in local industry related to automotive components. The performance of peening process has been measured in terms of surface hardness, surface roughness and residual stresses. An experimental design approach Response Surface Method (RSM) has been used for the design and analysis of experimental data. The effect of process parameters on performance characteristics has been depicted with the help of ANOVA. Optimal set of process parameters has been obtained on the basis of desirability approach. The optimised combination for best performance came as (Air pressure – 4.83 bars, Temperature of target surface – 30°C and stand-off distance-178 mm).

Fatigue strength of HVOF sprayed Cr3C2–25NiCr and WC-10Ni on AISI 4340 steel

2008 ◽  
Vol 203 (3-4) ◽  
pp. 191-198 ◽  
Author(s):  
R.C. Souza ◽  
H.J.C. Voorwald ◽  
M.O.H. Cioffi
Keyword(s):  
Fatigue Strength ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Study of Fatigue in AISI 4340 Steel with Different Microstructural Conditions, Submitted to a Surface Treatment of Shot Peening

2016 ◽  
Vol 869 ◽  
pp. 503-507 ◽  
Author(s):  
Carlos Eduardo Molento de Moraes ◽  
Carlos Antonio Reis Pereira Baptista ◽  
Marcelo Augusto dos Santos Torres ◽  
Maria Cindra Fonseca ◽  
Antonio Jorge Abdalla
Keyword(s):  
Fatigue Life ◽  
Surface Treatment ◽  
Shot Peening ◽  
Microstructural Characterization ◽  
Fatigue Tests ◽  
Aisi 4340 Steel ◽  
Compressive Stresses ◽  
4340 Steel ◽  
Fatigue Life Reduction ◽  
Aisi 4340

The AISI 4340 steel has been largely employed for structural purposes, which requires resistance levels with yield strength above 1400 MPa and it attains high levels of resistance in dual phase, bainitic or martensitic microstructural conditions. The samples of AISI 4340 steel with different microstructural conditions (martensitic, bainitic and ferritic/perlitic) have been submitted to fatigue tests on push-pull mode. Subsequently, the new specimens underwent a shot peening surface treatment and new fatigue tests. The results have been discussed in comparison to the three microstructural conditions studied and they were related to a microstructural characterization. The results have showed that a shot peening treatment is not always beneficial to fatigue life, since there is a relationship between the compressive stresses developed on the surface and its roughness formed due to the deformations. Under the three microstructural above studied it was noticed a strong fatigue life reduction in the martensitic condition because such microstructure is considered less ductile.

Effect of electroless nickel interlayer on the fatigue strength of chromium electroplated AISI 4340 steel

2007 ◽  
Vol 29 (4) ◽  
pp. 695-704 ◽  
Author(s):  
H VOORWALD ◽  
R PADILHA ◽  
M COSTA ◽  
W PIGATIN ◽  
M CIOFFI
Keyword(s):  
Fatigue Strength ◽  
Electroless Nickel ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340
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