A new α + β Ti-alloy with refined microstructures and enhanced mechanical properties in the as-cast state

The Cu-Cr and Cu-Cr-Ti alloy plates were prepared by vacuum melting and plastic deformation. The effect of slight Ti element on microstructure and mechanical properties of Cu-Cr alloy was discussed. The result shows that Cr particles with spherical shape precipitated from Cu matrix after aging. Plenty Ti atoms dissolved in the vicinity of Cr particles and there were still parts of solid solution Ti atoms in other regions. Improvements in peak hardness and softening resistance were achieved with the addition of Ti element in Cu-Cr alloy. The addition of 0.1 wt.% Ti element makes Cu-Cr alloy possess tensile strength of 565 MPa and hardness of 185.9 HV after aging at 450 °C for 120 min, which can be attributed to multiple strengthening mechanisms, i.e. work hardening, solid solution strengthening and precipitation strengthening.

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Excellent Mechanical Properties and High Electrical Conductivity of Cu-Co-Si-Ti Alloy Due to Multiple Strengthening

SSRN Electronic Journal ◽

10.2139/ssrn.3782845 ◽

2021 ◽

Author(s):

Yongfeng Geng ◽

Yijie Ban ◽

Xu Li ◽

Yi Zhang ◽

Kexing Song ◽

...

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Ti Alloy ◽

High Electrical Conductivity

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Effect of multiaxial cryoforging on microstructure and mechanical properties of a Cu-Ti Alloy

Materials Research Express ◽

10.1088/2053-1591/aaf085 ◽

2018 ◽

Vol 6 (2) ◽

pp. 026556 ◽

Cited By ~ 3

Author(s):

S Ramesh ◽

H Shivananda Nayaka ◽

K R Gopi ◽

Sandeep Sahu

Keyword(s):

Mechanical Properties ◽

Ti Alloy ◽

Microstructure And Mechanical Properties

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Microstructural and Mechanical Properties of β-Type Ti–Nb–Sn Biomedical Alloys with Low Elastic Modulus

Metals ◽

10.3390/met9060712 ◽

2019 ◽

Vol 9 (6) ◽

pp. 712 ◽

Cited By ~ 13

Author(s):

Peiyou Li ◽

Xindi Ma ◽

Duo Wang ◽

Hui Zhang

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Elastic Modulus ◽

Martensite Phase ◽

Ti Alloy ◽

Martensitic Phase Transition ◽

Low Elastic Modulus ◽

Nb Content ◽

Biomedical Alloy ◽

Cp Ti

The microstructural and mechanical properties of β-type Ti85-xNb10+xSn5 (x = 0, 3, 6, 10 at.%) alloys with low elastic modulus were investigated. The experimental results show that the Ti85Nb10Sn5 and Ti75Nb20Sn5 alloys are composed of simple α and β phases, respectively; the Ti82Nb13Sn5 and Ti79Nb16Sn5 alloys are composed of β and α″ phases. The content of martensite phase decreases with the increase of Nb content. The Ti82Nb13Sn5 and Ti79Nb16Sn5 alloys show an inverse martensitic phase transition during heating. The Ti85Nb10Sn5 and Ti82Nb13Sn5 alloys with the small residual strain exhibit the good superelastic properties in 10-time cyclic loading. The reduced elastic modulus (Er) of the Ti75Nb20Sn5 alloy (61 GPa) measured by using the nanoindentation technique is 2–6 times of that of human bone (10–30 GPa), and is smaller than that of commercial Ti-6Al-4V biomedical alloy (120 GPa). The Ti75Nb20Sn5 alloy can be considered as a novel biomedical alloy. The wear resistance (H/Er) and anti-wear capability (H3/Er2) values of the four alloys are higher than those of the CP–Ti alloy (0.0238), which indicates that the present alloys have good wear resistance and anti-wear capability.

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Microstructure and Mechanical Performance of AZ31-1.7 Wt.% Si Alloy Processed by Cyclic Channel Die Compression

Materials Science Forum ◽

10.4028/www.scientific.net/msf.667-669.457 ◽

2010 ◽

Vol 667-669 ◽

pp. 457-461

Author(s):

Wei Guo ◽

Qu Dong Wang ◽

Man Ping Liu ◽

Tao Peng ◽

Xin Tao Liu ◽

...

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Tensile Strength ◽

Mechanical Performance ◽

Chinese Script ◽

Cast State ◽

Microstructure And Mechanical Properties ◽

Mean Grain Size ◽

The Matrix ◽

The Mean

Cyclic channel die compression (CCDC) of AZ31-1.7 wt.% Si alloy was performed up to 5 passes at 623 K in order to investigate the microstructure and mechanical properties of compressed alloys. The results show that multi-pass CCDC is very effective to refine the matrix grain and Mg2Si phases. After the alloy is processed for 5 passes, the mean grain size decreases from 300 μm of as-cast to 8 μm. Both dendritic and Chinese script type Mg2Si phases break into small polygonal pieces and distribute uniformly in the matrix. The tensile strength increases prominently from 118 MPa to 216 MPa, whereas the hardness of alloy deformed 5 passes only increase by 8.4% compared with as-cast state.

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Variation of Microstructure and Mechanical Properties of ZW61 Magnesium Alloy Solidified under Different Pressures

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.327.3 ◽

2022 ◽

Vol 327 ◽

pp. 3-10

Author(s):

Shu Sen Wu ◽

Xiao Gang Fang ◽

Shu Lin Lü ◽

Long Fei Liu ◽

Wei Guo

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Volume Fraction ◽

Applied Pressure ◽

Second Phase ◽

Cast State ◽

Microstructure And Properties ◽

Microstructure Refinement ◽

Porosity Reduction ◽

Average Grain Size

There is little datum related to microstructure and properties of Mg alloys squeeze-casted with pressure over 200 MPa. In this study, the microstructure and properties of Mg-6Zn-1.4Y (ZW61) alloy solidified under 100MPa to 800MPa were investigated. The results show that a remarkable microstructure refinement and porosity reduction can be reached through solidification under high pressure. The average grain size and the volume fraction of second phase, i.e. quasicrystal I-phase, decrease continuously with the increase of applied pressure. The tensile properties, especially elongation, are obvious enhanced because of the microstructure refinement and castings densification under high pressure. The ultimate tensile strength and elongation of ZW61 alloy in as-cast state are 243 MPa and 18.7% when the applied pressure is 800 MPa, which are increased by 35% and 118% respectively, compared with that of the gravity castings.

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