Effect of Surface Roughness on Fatigue Strength in Hot-rolled Sheet Steel with High Tensile Strength : Part 2 : Effect of Mean Stress

The published papers related to the effects of surface finish on fatigue strength are reviewed in order to formulate its factor in the design fatigue curve in air environment. Firstly, some of regulations and literatures were examined to verify the surface finish effect on fatigue strength and formulation of that in design fatigue curve. The fatigue strength of carbon and low alloy steels is decreased with an increase of its surface roughness and tensile strength but that of stainless steel is not decreased except for special conditions. After screening the data of carbon and low alloy steels, a surface finish factor is formulated with these data which is a function of tensile strength, surface roughness and mean stress.

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FEM Analysis of Crashworthiness of Hot-Rolled Sheet Steel with Excellent Bake Hardenability in Tensile Strength

10.4271/2003-01-2808 ◽

2003 ◽

Author(s):

J. Hiramoto ◽

S. Kaneko ◽

T. Hira ◽

H. Abe

Keyword(s):

Tensile Strength ◽

Sheet Steel ◽

Fem Analysis ◽

Rolled Sheet ◽

Hot Rolled ◽

Bake Hardenability

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PENGARUH PENGHILANGAN KEKASARAN PERMUKAAN TERHADAP KEKUATAN FATIK = EFFECT OF SURFACE ROUGHNESS REMOVAL TO FATIGUE STRENGTH

Majalah ilmiah Pengkajian Industri ◽

10.29122/mipi.v9i3.1642 ◽

2015 ◽

Vol 9 (3) ◽

pp. 115-130

Author(s):

H. Agus Suhartono

Keyword(s):

Surface Roughness ◽

Fatigue Life ◽

Fatigue Strength ◽

Fatigue Loading ◽

Bending Fatigue ◽

Aisi 1045 Steel ◽

Aisi 1045 ◽

1045 Steel ◽

Test Result ◽

Effect Of Surface

The aim of the study is to investigate and to prove that the fatigue failure of steel is initiated from the surface. Hence the preventif action of smoothening the surface that has been loaded by fatigue loading is very important. The specimen of AISI 1045 Steel is loaded by means of rotary bending fatigue. The fatigue loading will be interupted as the fatigue life reaching 50% of fatigue life and 75% of fatigue life. During the interuption the specimen will be grinded and polished, before tested completely until fatigue fracture occured. The fatigue life of each group of scpecimen based on the art of loading will be compared to the specimen tested by fatigue loading without interuption.The Miner rule is used to evaluated the test result. The influence of interuption and surface treatment is evaluated and analyzed.Â ABSTRAKTujuan penelitian ini adalah untuk menyelidiki dan membuktikan bahwa kegagalan kelelahan baja dimulai dari permukaan. Oleh karena itu tindakan pencegahan dengan memperhalus permukaan sangat penting untuk mencegah beban kelelahan baja. Spesimen dari AISI 1045 Steel dimuat dengan cara uji kelelahan lentur putar. Kelelahan pemuatan akan disela sebagai umur kelelahan mencapai 50% dari umur kelelahan dan 75% dari umur kelelahan. Selama gangguan lainnya yang spesimen akan digiling dan dipoles, sebelum diuji benar-benar sampai patah akibat kelelahan yang terjadi. Umur kelelahan dari setiap kelompok specimen diuji berdasarkan beban akan dibandingkan dengan spesimen oleh kelelahan bongkar tanpa aturan. The Miner rule digunakan untuk mengevaluasi hasil tes. Pengaruh gangguan lainnya dan perlakuan permukaan dievaluasi dan dianalisis.Â

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Improvement in Formability of Hot Rolled High Tensile Strength Steel Sheets by Cerium Addition

Transactions of the Iron and Steel Institute of Japan ◽

10.2355/isijinternational1966.15.137 ◽

1975 ◽

Vol 15 (3) ◽

pp. 137-144 ◽

Cited By ~ 3

Author(s):

Takashi MATSUOKA ◽

Toshihiko KAWAI ◽

Yoshihiko HOBO ◽

Shin-ya UEDA

Keyword(s):

Tensile Strength ◽

High Tensile Strength ◽

Steel Sheets ◽

Hot Rolled

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