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Book The Effect of Shot peening on the Fatigue Limits of Four Connecting Rod Steels

Download or read book The Effect of Shot peening on the Fatigue Limits of Four Connecting Rod Steels written by Mohammad-Mahdi Mirzazadeh and published by . This book was released on 2010 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work was carried out to study the effect of shot-peening on the fatigue behaviour of carbon steels. Differently heat treated medium and high carbon steel specimens were selected. Medium carbon steels, AISI 1141 and AISI 1151, were respectively air cooled and quenched-tempered. A high carbon steel, C70S6 (AISI 1070), was air cooled. The other material was a powder metal (0.5% C) steel. Each group of steels was divided into two. One was shot-peened. The other half remained in their original conditions. All were fatigue tested under fully reversed (R=-1) tension-compression loading conditions. Microhardness tests were carried out on both the grip and gage sections of selected non shot-peened and shot-peened specimens to determine the hardness profile and effect of cycling. Shot-peening was found to be deeper on one side of each specimen. Compressive residual stress profiles and surface roughness measurements were provided. Shot-peening increased the surface roughness from 0.26±0.03[mu]m to 3.60±0.44[mu]m. Compressive residual stresses induced by shot-peening reached a maximum of -463.9MPa at a depth of 0.1mm. The fatigue limit (N[dsim]106 cycles) and microhardness profiles of the non shot-peened and shot-peened specimens were compared to determine the material behaviour changes after shot-peening and cycling. Also their fatigue properties were related to the manufacturing process including heat and surface treatments. Comparing the grip and gage microhardness profiles of each steel showed that neither cyclic softening nor hardening occurred in the non shot-peened condition. Cyclic softening was apparent in the shot-peened regions of all steels except powder metal (PM) steel. The amount of softening in the shot-peened region was 55.0% on the left side and 73.0% on the right in the AISI 1141 steel, 46.0% on the left side and 55.0% on the right in the C70S6AC steel and 31.0% on the right side in AISI 1151QT steel. Softening was accompanied by a decrease in the depth of surface hardness. It is suggested that although the beneficial effects of shot peening, compressive residual stresses and work hardening, were offset by surface roughness, crack initiation was more likely to occur below the surface. Surface roughness was not a significant factor in controlling the fatigue lives of AISI 1141AC and C70S6 steels, since they were essentially the same for the non shot-peened and shot-peened conditions. Shot-peening had very little effect on the push-pull fatigue limit of C70S6 steel ( -2.1%), and its effect on AISI 1141AC steel was relatively small (6.0%). However, the influence of shot-peening on the AISI 1151QT and PM steels was more apparent. The fatigue limit of the PM steel increased 14.0% whereas the fatigue limit of the AISI 1151QT steel decreased 11.0% on shot peening.

Book The Journal of the Iron and Steel Institute

Download or read book The Journal of the Iron and Steel Institute written by Iron and Steel Institute and published by . This book was released on 1969 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes sect. "A survey of literature on the manufacture and properties of iron and steel, and kindred subjects" (title varies)

Book Engineers Digest

Download or read book Engineers Digest written by and published by . This book was released on 1959-07 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Surface Fatigue Lives of Case Carburized Gears With an Improved Surface Finish

Download or read book Surface Fatigue Lives of Case Carburized Gears With an Improved Surface Finish written by and published by . This book was released on 2000 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous research provides qualitative evidence that an improved surface finish can increase the surface fatigue lives of gears. To quantify the influence of surface roughness on life, a set of AISI 9310 steel gears was provided with a near-mirror finish by superfinishing. The effects of the superfinishing on the quality of the gear tooth surfaces were determined using data from metrology, profilometry, and interferometric microscope inspections. The superfinishing reduced the roughness average by about a factor of 5. The superfinished gears were subjected to surface fatigue testing at 1.71-GPa (248-ksi) Hertz contact stress, and the data were compared with the NASA Glenn gear fatigue data base. The lives of gears with superfinished teeth were about four times greater compared with the lives of gears with ground teeth but with otherwise similar quality.

Book Fatigue Design

Download or read book Fatigue Design written by Eliahu Zahavi and published by CRC Press. This book was released on 2019-01-22 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern analytical theories of fatigue coupled with a knowledge of processing effects on metals make up the sound basis for designing machine parts that are free from unexpected failure. Fatigue Design: Life Expectancy of Machine Parts provides the information and the tools needed for optimal design. It highlights practical approaches for effectively solving fatigue problems, including minimizing the risk of hidden perils that may arise during production processes or from exposure to the environment.The material is presented with a dual approach: the excellent coverage of the theoretical aspects is accented by practical illustrations of the behavior of machine parts. The theoretical approach combines the fundamentals of solid mechanics, fatigue analysis, and crack propagation. The chapters covering fatigue theories are given special emphasis, starting with the basics and progressing to complicated multiaxial nonlinear problems.The practical approach concentrates on the effects of surface processing on fatigue life and it illustrates many faceted fatigue problems taken from case studies. The solutions demonstrate the authors' detailed analyses of failure and are intended to be used as preventive guidelines. The cases are a unique feature of the book. The numerical method used is the finite element method, and is presented with clear explanations and illustrations.Fatigue Design: Life Expectancy of Machine Parts is an extremely valuable tool for both practicing design engineers and engineering students.

Book Steels in Modern Industry

Download or read book Steels in Modern Industry written by William Edwin Benbow and published by . This book was released on 1951 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Journal of Steel Castings Research

Download or read book Journal of Steel Castings Research written by and published by . This book was released on 1976 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Machine Design

Download or read book Machine Design written by and published by . This book was released on 1961 with total page 1778 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Handbook of Mechanical Nanostructuring

Download or read book Handbook of Mechanical Nanostructuring written by Mahmood Aliofkhazraei and published by John Wiley & Sons. This book was released on 2016-05-02 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing in-depth information on how to obtain high-performance materials by controlling their nanostructures, this ready reference covers both the bottom-up and the top-down approaches to the synthesis and processing of nanostructured materials. The focus is on advanced methods of mechanical nanostructuring such as severe plastic deformation, including high pressure torsion, equal channel angular processing, cyclic extrusion compression, accumulative roll bonding, and surface mechanical attrition treatment. As such, the contents are inherently application-oriented, with the methods presented able to be easily integrated into existing production processes. In addition, the structure-property relationships and ways of influencing the nanostructure in order to exhibit a desired functionality are reviewed in detail. The whole is rounded off by a look at future directions, followed by an overview of applications in various fields of structural and mechanical engineering. With its solutions for successful processing of complex-shaped workpieces and large-scale specimens with desired properties, this is an indispensable tool for purposeful materials design.

Book EFFECT OF SURFACE ROLLING AND SHOT PEENING ON NOTCHED FATIGUE STRENGTH INAL 2024

Download or read book EFFECT OF SURFACE ROLLING AND SHOT PEENING ON NOTCHED FATIGUE STRENGTH INAL 2024 written by L. Wagner and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Study of the Fatigue of Tool Steels Having a Surface Coating

Download or read book A Study of the Fatigue of Tool Steels Having a Surface Coating written by S. S. KRUGLIKOV and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONCLUSIONS: The fatigue strength of chrome tool steel is substantially reduced as a result of applying a metallic coating by spraying, dipping, or electrolysis. The decrease occurs before and after holding the steel at an elevated temperature. Shot-peening or nitriding the surface of steel prior to application of a coating considerably increases the fatigue strength of the coated specimens. This effect also occurs after holding the coated specimens at elevated temperatures. Aluminum-silicon paint does not substantially effect the fatigue of steel. (Author).