Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy

Nie, Baohua; Zhang, Zhao; Chen, Dongchu; Shu, Liu; Lu, M. W.; Zhang, Jianglong; Liang, Feng

doi:10.3390/met8060401

Cited by 22 publications

(16 citation statements)

References 28 publications

(44 reference statements)

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“…However, the completely opposite result, the bimodal microstructure presented a higher VHCF strength than the fully lamellar microstructure, was reached by Zuo et al 12 and Crupi et al 19 Moreover, Liu et al 18 discovered that the VHCF strength of the bimodal microstructure was similar to that of the equiaxed microstructure. The miniaturization of microstructure was beneficial to enhance the VHCF resistance 17,20 . Summarized, the relationship between VHCF strengths and microstructure characteristics is intricate.…”

Section: Introductionmentioning

confidence: 99%

Influence of the volume content of α + β colonies on the very high cycle fatigue behavior of a titanium alloy

Yang

Huang

Zhong

et al. 2021

Fatigue Fract Eng Mat Struct

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A turbine engine blade alloy (Ti‐8Al‐1Mo‐1V) under different heat treatment conditions was employed to conduct ultrasonic fatigue tests to investigate the influence of the colony content of bimodal titanium alloys on the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) behavior. As a result, the increase in the content of colonies or the decrease in the content of primary α grains (αp) can be achieved by a double‐annealed treatment below the α + β to β transformation temperature. A higher colony content will result in a higher HCF and VHCF properties. The crack initiation life has a lower sensitivity to the microstructure change in the αp/colony content than the fatigue crack growth life. With the fatigue life increasing from the HCF regime to the VHCF regime, the impact of the microstructure evolution on fatigue resistances gradually decreases. Irreversibly, slips mainly along the maximum shearing stress direction make the plastic strain accumulate within some favorably oriented αp grains and further cause the nucleation of fatigue micro‐cracks. The formation of the fine granular area is attributed to the comprehensive effects of the vacuum‐enhanced plasticity and the numerous cyclic pressing.

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Section: Introductionmentioning

confidence: 99%

Influence of the volume content of α + β colonies on the very high cycle fatigue behavior of a titanium alloy

Yang

Huang

Zhong

et al. 2021

Fatigue Fract Eng Mat Struct

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show abstract

“…Crupi et al [31] obtained similar results through investigating the VHCF behavior of Ti-6Al-4V alloy produced by two forging processes. Recently, Nie et al [32] studied the fatigue performance of TC21 titanium alloy with two sizes of basketweave in the life span of 10 5 -10 9 . They pointed out that the fatigue property of the short size basketweave is higher.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Microstructure and Axial Tension on Three-Point Bending Fatigue Behavior of TC4 in High Cycle and Very High Cycle Regimes

Bao

Ding

et al. 2019

Materials

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The effects of microstructure and axial tension on the fatigue behavior of TC4 titanium alloy in high cycle (HCF) and very high cycle (VHCF) regimes are discussed in this paper. Ultrasonic three-point bending fatigue tests at 20 kHz were done on a fatigue life range among 10 5 -10 9 cycles of the alloys with equiaxed, bimodal and Widmanstatten microstructures. Experimental results without axial tension show that three typical shapes of S-N curves clearly present themselves for the three different microstructures. Moreover, the crack initiation sites abruptly shifted from surface to subsurface of the specimen in the very high cycle fatigue regime for equiaxed and bimodal microstructures. But for the Widmanstatten microstructure, both surface and subsurface crack initiation appeared in the high cycle fatigue regime, and the multi-points crack initiation was found in the bimodal microstructure. The subsurface fatigue crack originated from the α p grains in equiaxed and bimodal microstructures. However, it originated from the coarse grain boundary α in the Widmanstatten microstructure. Additionally, the S-N curve shape, fatigue life and fatigue crack initiation mechanism with axial tension are similar to that without axial tension. However, the crack origin point shifts inward with axial tension.

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“…However, Krahmer et al [5] takes the surface integrity and surface state as the consideration point, and abrasive water jet, wire electrodischarge machining, laser to replace the traditional milling processing of tensile samples, shortening the processing time and having great industrial value in industrial applications, In practical application literature [6][7][8][9], ball-burnishing means can be adopted to significantly improve the surface quality of materials, so as to improve the corrosion resistance and wear resistance of materials and reduce the wear ratio of materials. In terms of material fatigue, Nie et al [10] the surface state of titanium alloy after polishing can affect crack initiation in the fatigue process, thus affecting the fatigue performance of the material. Torres et al [11] found that micro-cracks formed on the surface of AISI 4340 steel during shot peening would have an impact on the initiation location of cracks.…”

Section: Introductionmentioning

confidence: 99%

Study of the Surface Integrity and High Cycle Fatigue Performance of AISI 4340 Steel after Composite Surface Modification

Liang

2019

Metals

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In the field of materials science, the fabrication of a material with severe surface plastic deformation and a good surface state is an issue encountered in the development of counterbalanced gradient materials. For this paper, AISI 4340 steel was first processed with abrasive water jet peening (AWJP) and then with ultrasonic surface rolling (USRE) to obtain a good surface state while maintaining large plastic deformation. The AISI 4340 steel composite surface was therefore modified, and the surface integrity and cycle fatigue performance were analyzed. The results show that the plastic deformation layer of the modified composite surface of the 4340 steel was 310 µm from the surface of the sample, the grain size 40 µm from the surface layer was refined to 70 nm, and the maximum surface roughness Ra is 0.06. The fatigue limit of the modified composite surfaces obtained by the tensile fatigue test was 595.7 MPa, which was 85.7 MPa higher than the 510 MPa fatigue limit of the unmodified matrix, indicating that the method of composite surface modification can produce a deep deformation layer while maintaining good surface conditions. The results show that work hardening caused by a composite surface treatment is the most important factor for improving the fatigue performance of materials.

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Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy

Cited by 22 publications

References 28 publications

Influence of the volume content of α + β colonies on the very high cycle fatigue behavior of a titanium alloy

Influence of the volume content of α + β colonies on the very high cycle fatigue behavior of a titanium alloy

The Effect of Microstructure and Axial Tension on Three-Point Bending Fatigue Behavior of TC4 in High Cycle and Very High Cycle Regimes

Study of the Surface Integrity and High Cycle Fatigue Performance of AISI 4340 Steel after Composite Surface Modification

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