Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains

Nunes, Dinis Garcia; Effertz, Pedro dos Santos; Quintino, L.; Pires, Inês; Fuchs, Franz; Enzinger, Norbert

doi:10.1007/s00170-018-1850-z

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Nunes at al. measured the residual stress, through the hole drilling method, in martensitic 18CrNiMo7-6 steel specimens in the following conditions: "as forged", "as welded", "as welded" without flash and post weld heat treated [47]. Interesting conclusions include that flash removal does not influence significantly the residual stress close to the weld center and post welding heat treatment switches the tensile stresses due to the welding process back into compressive, allowing to reach the highest values of compressive stresses close to the surface of the specimen.…”

Section: Linear Friction Weldingmentioning

confidence: 99%

Joining by forming technologies: current solutions and future trends

et al. 2022

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The progressively more demanding needs of emissions and costs reduction in the transportation industry are pushing engineers towards the use of increasingly lightweight structures. This goal can be achieved only if dissimilar and/or new materials, including polymers and composites, are joined together to create complex structures. Conventional fusion welding processes have often been proven inadequate to this task because of the high heat input reducing the joint mechanical properties or even making the joining process impossible. Joining by forming technologies take advantage on the plastic deformation to create sound joints out of even very dissimilar materials. Over the last 25 years, several new processes, with increasing potential in effectively joining virtually every structural material, have been invented and developed. In the paper, a comprehensive overview of the most utilized joining by forming processes is given. For each process, an analysis of the current research trends and hot topics is provided, highlighting strengths and weaknesses for industrial applications.

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Section: Linear Friction Weldingmentioning

confidence: 99%

Joining by forming technologies: current solutions and future trends

et al. 2022

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“…So far, many materials, such as aluminium alloys [5], super alloys [3], copper [7], steel [4] & magnesium [6], are welded without any failures. Among all materials which were welded with LFW, Titanium (Ti) Alloys which were materials that are most likely to produce robust connections as their thermal conductivity is less it limits volume of the material that are affected by some greater temperatures in a small processing time.…”

Section: Introductionmentioning

confidence: 99%

Welding Parameter Effects of Welded Ti-1.5Zr- 0.3Si-6.5Al-3.5Mo Joints

Ratnakar*,

Swetha,

Suresh

et al. 2020

IJRTE

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A research is done extensively on the welding parameters using linear friction which have effect on distribution of the texture; µ-structured shape of & the mechanical characteristics of Ti-1.5Zr-0.3Si-6.5Al-3.5Mo.The conclusions show that a velocity of critical shear which must be reached. As it reaches to that velocity of critical shear, it obtains a good joint. Thermo-mechanically affected zone (TMAZ) width decreases with shear rate or frictional pressure, while the Welding Center Zone (WCZ) width remains unchanged. In WCZ, a recrystallized µ-structured shape of β grains with the shape of needle which forms α laths, & the size of grain becomes shorter with the pressure of friction. Electronic diffraction analysis got performed for welding parameters texture analysis. With the pressure on friction increase, the strength of {1 1 2} <1 1 1> beta texture intensity increases. In case of textured alpha, the power of texture grows more & the rest decreases. By checking the mechanical properties, the relationship between β grain sizes, joint elongation width & maximum hardness were determined.

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On the Process Variables and Weld Quality of a Linear Friction Welded Dissimilar Joint between S31042 and S34700 Austenitic Steels

Wang

et al. 2019

Adv Eng Mater

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In this study, the dissimilar S31042 and S34700 austenitic stainless steels joints are welded with linear friction welding (LFW). The history of shear stress at the interface and axial shortening during LFW, the microstructure evolution and mechanical properties of the joint are studied. Results show that axial shortening develops during the equilibrium and deceleration phases. The shear stress reaches a maximum during deceleration as a metallurgical bond forms in sections of the interface. The weld center zone is a narrow layer with a thickness of about 380 µm, where there are fine equiaxed grains with a strong {112}<110> texture. Elongated grains are present in the thermo‐mechanically affected zone due to the shear stress. The average tensile strength and elongation of the joints are measured to be 577 MPa and 33.3%, respectively. All tensile test samples fail at the base material of S34700, as the tensile strength of the joint is equal to or better than that of the base S34700.

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Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains

Cited by 4 publications

References 18 publications

Joining by forming technologies: current solutions and future trends

Joining by forming technologies: current solutions and future trends

Welding Parameter Effects of Welded Ti-1.5Zr- 0.3Si-6.5Al-3.5Mo Joints

On the Process Variables and Weld Quality of a Linear Friction Welded Dissimilar Joint between S31042 and S34700 Austenitic Steels

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