Heterogeneous structure-induced strength-ductility synergy by partial recrystallization during friction stir welding of a high-entropy alloy

Lin, Po Ting; Liu, Hung Chi; Hsieh, Po Ying; Cheng, Wei; Tsai, Che-Wei; Sato, Yutaka; Chen, Shih Che; Yen, Hung‐Wei; Lu, Nian Hu; Chen, Chih‐Hsuan

doi:10.1016/j.matdes.2020.109238

Cited by 56 publications

(23 citation statements)

References 69 publications

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“…To be more specific most of the metallurgical observation is found through their combined test. Some used EBSD [23][24][25][26][27][28][29][30][31][32][33] or Electron Backscattered Diffraction as we know it, used to measure grain size and boundaries, yet it is a type of SEM that provides data in the form of crystallography representing different crystal orientations to define different metals. In this technique, stationary electrons are exposed to the crystalline sample tilted at an angle.…”

Section: Methodologies Usedmentioning

confidence: 99%

A review of effect on metallurgical properties of friction stir welding using high entropy alloy

Shende

Bombate²,

Kumbhare³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The work summarizes the review of use of High Entropy Alloy in the Friction Stir Welding. When High Entropy Alloy is utilized in the Friction Stir Welding the resultant mechanical, metallurgical as well as corrosive properties show the influence of HEA base material properties. The Process used to obtain HEA provides base properties affecting the microstructural impact due to heat generation in FSW. Taking into account HEA, FSW too improve the welding properties of the material. The grain size was affected by heat generation and pressure of rotational as well as transverse speed, and could be differentiated in different zones (SZ, HAZ, and TMAZ) and sides (advancing, retreating, top, and bottom). Results of misorentation, HABs, and LABs were influences by the type of recrystallization. GGAE are associated to HABs and SFE to heating phenomenon, so overall it is HEA reaction to the heat generation in different areas and its effects seen in recrystallization of grains.

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Section: Methodologies Usedmentioning

confidence: 99%

A review of effect on metallurgical properties of friction stir welding using high entropy alloy

Shende

Bombate²,

Kumbhare³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Besides, the idea of mixing multiple elements while increasing configurational entropy (>1.5 R) to enhance high-temperature phase stability expands the potential of new alloy design. Along with several extraordinary properties, HEAs have been applied to various functions and applications [9][10][11][12][13]. Moreover, the corrosion resistance [14][15][16][17][18][19][20][21][22] and mechanical properties [23][24][25][26][27][28][29][30] in HEAs are widely investigated due to their importance and necessity, and these fields have huge potential for further development.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo on the Mechanical and Corrosion Behaviors in Non-Equal Molar AlCrFeMnNi BCC High-Entropy Alloys

2022

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Co-free body-centered cubic (bcc) high-entropy alloys (HEAs) are prepared, and the elevated mechanical property and corrosion property of the Al0.4CrFe1.5MnNi0.5Mox (x = 0 and 0.1) alloys are studied. The Vickers hardness (HV) of the as-homogenized state is between HV 350 and HV 400. Both alloys are provided with nano-scale NiAl-rich B2 precipitates which contribute to the strength at high-temperature. In addition, adding Mo in the present alloy strengthens by σ phase. Al0.4CrFe1.5MnNi0.5Mo0.1 exhibited outstanding tensile properties, with a yield strength of 413 MPa and ultimate tensile strength of 430 MPa in the elevated tensile test at 600 °C, which is better than that of Al0.4CrFe1.5MnNi0.5 alloy. Through potentiodynamic polarization testing in 0.5 M H2SO4 solution and electrochemical impedance spectroscopy (EIS), it is shown that adding Mo can effectively reduce the corrosion current density and improve the impedance of passive film, since the passivation layer is formed and stable.

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“…In the view of a real application of HEAs, it appears of paramount importance to develop a solid knowledge about the joining of semi‐finished components made of the alloys themselves. Several works have addressed different joining techniques, including brazing, [ 8–10 ] friction stir welding, [ 11,12 ] diffusion bonding, [ 13,14 ] tungsten arc welding, [ 15 ] electron beam welding, [ 16,17 ] and laser welding, [ 18,19 ] and some review papers dealing with this topic have been published, too. [ 20–24 ] Moreover, large attention has been devoted to the dissimilar joining of HEAs to conventional alloys [ 25 ] and the use of HEAs as filler materials has been actively explored as well: [ 10,26 ] their thermal stability and good ductility have been particularly appreciated when joining refractory materials, and the sluggish diffusion effect has been exploited to prevent the formation of brittle intermetallics.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Welding of CoCuFeMnNi High Entropy Alloy: Processing, Microstructure, and Mechanical Properties

et al. 2022

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The present work explores the feasibility of joining the CoCuFeMnNi high entropy alloy by laser beam welding. An appropriate feasibility window is identified, and the optimal process parameters (300 W power, scanning speed 20 mm s−1, spot size 0.45 mm) are related to the properties of the studied material. Cu's tendency to segregate from other alloying elements is found to dominate the microstructural evolution: the welding process induced the formation of Cu‐rich second phases within the melted zone (MZ), as interdendritic phase, as well as in the heat‐affected zone (HAZ) as grain boundary phase. Mechanical resistance of the welded beads and the HAZs was improved (187 HV on average) over one of the base materials (BMs) (160 HV on average) owing to the formation of Cu‐rich phases and solidification stresses. Consequently, tensile strength (576.4 MPa) and elongation to failure (28.3%) are almost the same as in the BM. Indeed, failure during tensile tests always took place outside the welded bead, therefore confirming the extreme soundness of the performed laser beam welding. Such results confirm that laser welding may be safely applied to relatively complex high entropy alloys (HEA), thus easing their practical application.

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Heterogeneous structure-induced strength-ductility synergy by partial recrystallization during friction stir welding of a high-entropy alloy

Cited by 56 publications

References 69 publications

A review of effect on metallurgical properties of friction stir welding using high entropy alloy

A review of effect on metallurgical properties of friction stir welding using high entropy alloy

Effect of Mo on the Mechanical and Corrosion Behaviors in Non-Equal Molar AlCrFeMnNi BCC High-Entropy Alloys

Laser Beam Welding of CoCuFeMnNi High Entropy Alloy: Processing, Microstructure, and Mechanical Properties

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