Effect of machining parameters and heat treatment on the residual stress distribution in titanium alloy IMI-834

Sridhar, B. R.; Devananda, G.; Ramachandra, K.; Bhat, Ramaraja

doi:10.1016/s0924-0136(03)00612-5

Cited by 101 publications

(44 citation statements)

References 6 publications

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“…Although it is infrequent that the normal component σy is greater than σx (in absolute value), this has been reported previously in a paper on milled titanium alloy components [14], but not explained. In another study about milling in samples of AISI 4340 steel, Jacobus et al [15] show results where the normal component σy is also higher than σx but most values obtained are tensile.…”

Section: Resultsmentioning

confidence: 71%

Study of Residual Stresses from Two Machining Protocols Using an Indentation Method

Díaz

Mammana

Guidobono³

2013

IJMEA

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Abstract:Although high-speed machining offers a number of advantages over conventional machining, it is possible that the residual stress distributions generated by the former can affect the service life of the processed components. In this paper, a newly developed micro-indent method is used to evaluate different residual stress states, which were introduced in samples of AA 7075-T6 aluminum alloy milled at low and high-speed. Different surfaces were generated by varying the cutting speed in one order of magnitude, from 100 m/min to 1000 m/min. Two machining protocols, which consist of using different machine tools, were evaluated. The results show that it is possible to generate and to evaluate very small residual stresses. Finally, the values and levels obtained for normal components were analyzed in function of mechanical and thermal effects that generated the residual stresses.

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Section: Resultsmentioning

confidence: 71%

Study of Residual Stresses from Two Machining Protocols Using an Indentation Method

Díaz

Mammana

Guidobono³

2013

IJMEA

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“…Of these experimental techniques, two have been the most widely used and accepted for machined components: X-ray diffraction technique [6,7] and the hole-drilling method [8,9]. More recently, different indentation techniques have been used to determine residual stresses in machined parts.…”

Section: Related Workmentioning

confidence: 99%

Evaluation of Residual Stresses Induced by High Speed Milling Using an Indentation Method

Díaz¹,

Mammana²,

Guidobono³

2012

MME

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In this work, a recently developed method based on the change of distance between collinear indents is used to evaluate different states of residual stress, which were generated in samples of AA 6082-T6 and AA 7075-T6 aluminium alloys milled at high speed. One of the advantages of this method, which needs a universal measuring machine, is not requiring neither the use of specific equipment nor highly skilled operators. Also, by integrating an indentation device to the mentioned machine, the absolute error of measurement can be reduced. In results obtained in samples subjected to different cutting conditions it is observed a correlation between the stress values and the depth of cut, showing the AA 6082-T6 alloy higher susceptibility to be stressed. Furthermore, the high sensitivity of the method allowed detecting very small differences in the values reached by different normal components in the zones corresponding to climb and conventional cutting. It is important to note that these differences were similar for both evaluated alloys. Finally, the directions associated with the principal components of residual stress, where maximum local plastic stretching occurs, were found to be strongly dependent on the rolling direction prior to machining.

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“…However, the welding residual stress has great influence on the corrosion resistance of welded structures while the structures serve in a corrosive environment, thus effecting their security and service life [5][6][7][8] . Methods such as heat treatment and vibratory stress relief (VSR) are usually used to eliminate the residual stress in welded structures to reduce its effects on the structures [9][10][11] . However, it is difficult to eliminate the residual stress completely, especially in large-scale steel structures.…”

Section: Introductionmentioning

confidence: 99%

The Influence and Mechanism of Residual Stress on the Corrosion Behavior of Welded Structures

2018

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To study the influence of residual stress on the corrosion behavior of welded structures, methods such as residual stress measurement, microstructure observation, and corrosion morphology observation were used. The energy transformation model and corrosion-resistance constant model were utilized to reveal the mechanism of residual stress on the welded structures' corrosion behavior. The results show that the fusion line was the region that is most heavily affected by corrosion and sustains more serious corrosion damage than other areas, resulting in the welded structure becoming a high-incidence area for corrosion cracking and failure. Residual tensile stress could reduce the activation energy and surface atomic density, and therefore decrease the corrosion resistance of the welded structures. The residual compressive stress decreased the activation energy needed by metal atoms to convert into metal ions in welded structures, and simultaneously increased the surface atomic density. The corrosion resistance of the welded structures ultimately increased owing to the combined influence of changes in activation energy and surface atomic density.

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Effect of machining parameters and heat treatment on the residual stress distribution in titanium alloy IMI-834

Cited by 101 publications

References 6 publications

Study of Residual Stresses from Two Machining Protocols Using an Indentation Method

Study of Residual Stresses from Two Machining Protocols Using an Indentation Method

Evaluation of Residual Stresses Induced by High Speed Milling Using an Indentation Method

The Influence and Mechanism of Residual Stress on the Corrosion Behavior of Welded Structures

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