Surface residual stresses in machined austenitic stainless steel

Jang, Dong Kee; Watkins, Thomas R.; Kozaczek, K. J.; Hubbard, Camden R.; Cavin, O.B.

doi:10.1016/0043-1648(95)06838-4

Cited by 127 publications

(62 citation statements)

References 8 publications

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“…Many aspects related to residual stresses in machining have been covered by these analyses. It has been noted that tensile residual stresses can result from the competition between mechanical and thermal effects [6]. The tensile or compressive nature of residual stresses depends not only on machining parameters such as cutting speed, feed rate, rake angle, but also on the tool geometry and the lubrication conditions [7].…”

Section: Introductionmentioning

confidence: 99%

Residual Stresses in Orthogonal Cutting of Metals: The Effect of Thermomechanical Coupling Parameters and of Friction

Miguélez

Zaera

Molinari

et al. 2009

Journal of Thermal Stresses

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The generation of residual stresses in orthogonal machining is analysed by using an Arbitrary Lagrangian Eulerian (ALE) finite element approach. It is shown that a substantial level of tensile residual stresses can be obtained in the vicinity of the machined surface without any contribution of thermal effects. This motivates the development of a parametric study to analyse the effects of the thermomechanical coupling parameters on residual stresses. The roles of thermal expansion, of thermal softening and of the Taylor-Quinney coefficient (controlling the heat generated by plastic flow) are considered separately. The influence of friction is also analysed by assuming dry cutting conditions and a Coulomb friction law. The friction coefficient has a complex effect by controlling heat generation (frictional heating) along the tool rake and clearance faces and the propensity for the chip to stick to the tool. Geometrical effects such as the tool rake angle and the tool edge radius are also discussed.

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Section: Introductionmentioning

confidence: 99%

Residual Stresses in Orthogonal Cutting of Metals: The Effect of Thermomechanical Coupling Parameters and of Friction

Miguélez

Zaera

Molinari

et al. 2009

Journal of Thermal Stresses

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“…The cutting force in the hoop direction is usually the largest and has the most significant effect on the residual stresses on a turned surface. Therefore, it is likely to expect the largest stress in the circumferential/hoop direction (Jang, Watkins, Kozaczek, Hubbard & Cavin, 1996). Machining induced tensile residual stresses displayed sharp gradient in the shallow surface layer of 80 µm depth in which residual stresses experienced rapid drop as shown in Figure 2a.…”

Section: Machining-induced Cold Deformation In Type 304 Stainless Steelmentioning

confidence: 99%

Non-destructive Micro-structural Characterization of Metallic Specimens with a Portable X-ray Diffraction based Residual Stress Analyzer

Ganesh

Nagpure

Kaul

et al. 2015

SET

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Non-destructive characterization of surface microstructure of an engineering component is an important parameter to assess its fitness to function in the given service conditions. The paper describes various case studies performed in authors' laboratory involving use of portable X-ray diffraction based residual stress analysis system to examine and understand the micro-structural state of the investigated surface. A significant decrease in full width at half maximum (FWHM) of gamma(311) diffraction peak from about 4.2° in the cold worked state to about 2.5° in the annealed/surface melted state was recorded for austenitic stainless steel. In case of 0.4% carbon steel there is sharp increase in FWHM of alpha(211) diffraction peak from about 2° in the as received condition to about 5-6° in the laser hardened condition. Crystallographic texture developed during electro-plating of chromium on stainless steel, could be detected from the strong intensity of alpha (211) peak of chromium at about 19° to the surface normal with respect to all other X-ray inclination angles (ѱ) during residual stress measurement. The results show that FWHM and intensity variation of the diffraction peak are two sensitive parameters for characterization of surface microstructure. Change in FWHM has been used to detect machining-induced cold deformation and evolution of re-crystallized grains in austenitic stainless steel and formation of hard martensite in laser transformation hardened ferritic steel. Variation in the intensity of diffracted peak with respect to X-ray inclination angle provided valuable information regarding crystallographic texture in hard chrome plated deposits.

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“…For the specimen with 130 µm removed, the measured value was 463 ± 57 MPa, less than the calculated value. The measured stress could be considered as the stress at the location because the penetration depth of X-ray is about 5 µm [17]. Highly measured stress is probably due to the 100 µm thick cold worked layer.…”

Section: Materials and Test Specimenmentioning

confidence: 99%

Evaluation of Primary Water Stress Corrosion Cracking Resistance of Three Heats of Alloy 600 in 400 °C Hydrogenated Steam Condition

Yun

Chung

Jang

2018

Metals

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For Alloy 600, primary water stress corrosion cracking (PWSCC) is one of the key material degradation mechanisms in pressurized water reactors (PWRs). To identify the governing factors of PWSCC resistance, a systematic investigation into the role of each factor was performed. A PWSCC initiation test was performed for 3 heats of Alloy 600 in the 400 • C hydrogenated steam condition. Based on the test results, the effects of known factors like chemical composition, mechanical strength, grain boundary carbide coverage, grain boundary character, and surface cold work on PWSCC resistance were discussed. In addition, surface oxide morphology and penetrative oxide depth was compared. From this study, grain boundary character was considered to be the most dominant factor affecting the PWSCC resistance.

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Surface residual stresses in machined austenitic stainless steel

Cited by 127 publications

References 8 publications

Residual Stresses in Orthogonal Cutting of Metals: The Effect of Thermomechanical Coupling Parameters and of Friction

Residual Stresses in Orthogonal Cutting of Metals: The Effect of Thermomechanical Coupling Parameters and of Friction

Non-destructive Micro-structural Characterization of Metallic Specimens with a Portable X-ray Diffraction based Residual Stress Analyzer

Evaluation of Primary Water Stress Corrosion Cracking Resistance of Three Heats of Alloy 600 in 400 °C Hydrogenated Steam Condition

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