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.

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

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.

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

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

Evaluation on fatigue strength of AISI 4340 steel aluminum coated by electroplating and IVD processes

2010 ◽  
Vol 45 (22) ◽  
pp. 6094-6100 ◽  
Author(s):  
Herman Jacobus Cornelis Voorwald ◽  
Mauro Pedro Peres ◽  
Midori Yoshikawa Pitanga Costa ◽  
Maria Odila Hilário Cioffi
Keyword(s):  
Fatigue Strength ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Effect of Machining Processes on the Fatigue Strength of Hardened AISI 4340 Steel

1991 ◽  
Vol 113 (2) ◽  
pp. 154-159 ◽  
Author(s):  
Y. Matsumoto ◽  
D. Magda ◽  
D. W. Hoeppner ◽  
Tae Young Kim
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Fatigue Testing ◽  
Ground Surface ◽  
Machining Processes ◽  
Aisi 4340 Steel ◽  
Fly Cutting ◽  
4340 Steel ◽  
Finishing Processes ◽  
Aisi 4340

The effect of two finishing processes, namely, cutting and grinding, on the fatigue strength of hardened AISI 4340 steel was investigated. Three sets of flat tensile specimens were prepared by first machining into the general shape of the fatigue specimen standard, then they were hardened to HRC 54. The final grinding was carefully performed on one set of specimens. Two sets of specimens were fly cut to obtain a surface finish comparable to the ground surface. The residual stress distribution, surface structure, and surface profiles were determined. Fatigue testing was accomplished on these specimens in tension under load control. All the residual stress patterns were compressive, but the residual stress created by fly cutting reached a much deeper layer than that created by grinding. Fly cutting also produced a surface with a higher fatigue strength than the grinding did.

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
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