Influence of Heat Treatment on Residual Stress in Cold-Forged Parts

Neves, Frederico Ozanan; Oliviera, Thiago Luis Lara; Braga, Durval Uchôas; Silva, Alex Sander Chaves da

doi:10.1155/2014/658679

Cited by 15 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cold rolling and subsequent annealing of Invar alloys result in the recovery and recrystallization of the alloys. The rearrangement and annihilation of dislocations during recovery and grain nucleation and growth during recrystallization can drastically alter not only the mechanical properties of alloys, but also the residual stress [15][16][17]. It is known that the underlying factors that contributes to changes in the mechanical properties of a material can readily affect the residual stress of the material.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure, Mechanical Properties and Residual Stress of a Cold Rolled Invar Sheet Due to Heat Treatment

Park

Kim

et al. 2022

Metals

View full text Add to dashboard Cite

Invar alloy possesses a uniquely low coefficient of thermal expansion, making it an ideal material for fine metal masks. To manufacture fine metal masks, Invar alloys are often cold-rolled, during which residual stress develops. Heat treatment is an effective means to control residual stress that develops within Invar sheets after cold rolling, but the treatment should be carried out with care. In this article, a comprehensive study on the effect of heat treatment on the residual stress, microstructure, and mechanical properties of a cold-rolled Invar sheet is reported. We show that while both recovery and recrystallization are effective means of reducing residual stress, substantial microstructural changes and, therefore, notable changes in mechanical properties and residual stress, occur after recrystallization. Moreover, residual stress release due to recrystallization can be affected by microstructure and texture prior to heat treatment as these factors play a significant role in recrystallization.

show abstract

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure, Mechanical Properties and Residual Stress of a Cold Rolled Invar Sheet Due to Heat Treatment

Park

Kim

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…It can be seen that most researchers reduce the residual stress of forgings by adjusting the heat treatment process parameters. However, as far as the present technology is concerned, it is impossible to completely eliminate the residual stress of forgings by heat treatment [15]. In addition, it was found that the qualified rate of a certain type of blade is increased by 20%-30% after heat treatment and the adjustment of cutting process parameters, but there are still a lot of scrapped products due to deformation, and the total qualified rate is only 70%.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Forging Process Parameters and Prediction Model of Residual Stress of Ti‐6Al‐4V Alloy

Fang

Liu

Lü³

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Nonisothermal forging is an efficient plastic forming method for titanium alloys, but at the same time, it can produce large and uneven residual stress, which seriously affects the service life of components. In order to quantitatively analyze the influence of forging process parameters on the residual stress of Ti-6Al-4V alloy forgings, a numerical model was first established and optimized in combination with experiments. Then, the effects of deformation temperature, deformation degree, and deformation speed on the residual stress of forgings were analyzed by orthogonal test, and the optimal combination of forging process parameters was obtained. Finally, the multiple regression analysis was employed to propose multivariate regression models for the prediction of the average equivalent residual stress. Results show that the prediction model can be used for predicting the residual stress of Ti-6Al-4V alloy forgings with a higher reliability.

show abstract

“…The residual stress is concentrated in the region defects causing easier destruction around the vacancy [5]. The residual stresses are dependent on the factors including heat treatment applied, in addition to the intensity and nature of the residual stresses originally within the body [6]. Scanning contact potentiometry (SCP) is a new non-destructive material testing method making it possible to assess the microstructure of the object material without affecting or damaging it.…”

Section: Introductionmentioning

confidence: 99%

Experimental prediction of lead failure under tensile load using scanning contact potentiometry technique

Ghazal¹,

Husein²,

Surin

et al. 2021

Lett. Mater.

View full text Add to dashboard Cite

The issue of accurate identifying in advance structural nonhomogeneities of metals is one of the main factors in improving the manufacturing efficiency and safety during service. This paper illustrates the conventional uni-axial tensile test that is carried out on the diffuse and localized necking stages of dog-bone shape lead specimen. The scanning contact potentiometry method was used to locate the rupture zone. Infrared radiation was used to heat the specimen up to 40°C, in order to excite structural nonhomogeneities in the bulk of the tested specimen. It was found that the infrared radiation increases the predictable nonhomogeneity zone. A ductile rupture occurs in the same nonhomogeneity zone that was previously exactly identified using the scanning contact potentiometry method. The formed diffused necking was observed to initiate from the right where the rupture spread diagonally, at an angle of 70° between the tensile axis and the rupture plane. However, the angle between the tensile axis and the hexagonal singular reflex plane was 69°, which was slightly different from the rupture angle. Both results of the rupture angles of the tensile test and the SCP are relatively matching and diverse from the theoretical calculations. The results shown in this work highlight the importance and the efficiency of the experimental SCP method in prediction of the material failure behaviour.

show abstract

Influence of Heat Treatment on Residual Stress in Cold-Forged Parts

Cited by 15 publications

References 14 publications

Evolution of Microstructure, Mechanical Properties and Residual Stress of a Cold Rolled Invar Sheet Due to Heat Treatment

Evolution of Microstructure, Mechanical Properties and Residual Stress of a Cold Rolled Invar Sheet Due to Heat Treatment

Optimization of Forging Process Parameters and Prediction Model of Residual Stress of Ti‐6Al‐4V Alloy

Experimental prediction of lead failure under tensile load using scanning contact potentiometry technique

Contact Info

Product

Resources

About