Micro- and macroscopic plastic flow responses in high Nb-containing TiAl alloy by nanoindentation

Wang, Zhaoxin; Wang, Shunbo; Zhou, Shuilong; Wang, Jiru; Niu, Yihan; Zhang, Meng; Zhao, Hongwei

doi:10.1016/j.intermet.2020.106958

Cited by 7 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…to determine Young's modulus [6][7][8][9], yield strength [10][11][12], fracture toughness [13][14][15][16], and stress-strain curves [17][18][19], etc. In addition, the safety of service structures with residual stress could also be evaluated through indentation testing [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

An indentation method for determining the film thickness, Young’s modulus, and hardness of bilayer materials

Zhao¹,

Zhang²,

Liu³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Simultaneously determining the film thickness, Young’s modulus and hardness of film and substrate is a significant challenge due to the substrate effect. A method to solve the inverse problem of characterizing the mechanical properties of bilayer materials for instrumented indentation testing is proposed. This is done in combination with a weight function which could be obtained via finite element simulation. Using the proposed method, the film thickness and Young’s modulus of film-substrate materials, and the hardness values of the film and substrate could be determined. The proposed method is applicable to Vickers, Berkovich, and 70.3° conical indenters. Within the study range, numerical and theoretical results show that this method is both feasible and accurate in determining the above parameters, compared with existing experimental results. The method flow chart to determine the above parameters is also shown. This method separates the coupling effect between the film and the substrate in the bilayer material, giving it practical prospects in the field of indentation testing technology.

show abstract

Section: Introductionmentioning

confidence: 99%

An indentation method for determining the film thickness, Young’s modulus, and hardness of bilayer materials

Zhao¹,

Zhang²,

Liu³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…This will decrease the air‐craft weight so increasing the load‐carrying ability. [ 1–4 ] There are many good elevated‐temperature properties such as good oxidation resistance, high creep resistance, and good high‐temperature mechanical properties. [ 5–9 ] To further regulate and control the microstructure and improve the elevated tensile properties of TiAl alloys, the idea of composite materials has been considered by some researchers, and many interesting experimental results have been obtained in this respect.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heating Power on Microstructure Evolution and Tensile Properties at Elevated Temperature by Directional Solidification for Ti2AlC/TiAl Composites

et al. 2021

View full text Add to dashboard Cite

To improve the directionally solidified microstructure and tensile properties at elevated temperature, Ti46Al4Nb1C0.8Ta ingots are directional solidified by electromagnetic cold crucible with different heating powers. The microstructure is observed and characterized, tensile properties are tested, and related mechanisms are revealed. Results show that a relatively planar liquid–solid interface is formed under the low heating power (39 kW), which promoted formation of columnar crystals. When the heating power increases from 39 to 48 kW, degree of dent (H1) increases from 8.5 to 18.1 mm and influence length of the initial transition area (H2) increases from 4.3 to 28.6 mm. The formation of a concave liquid–solid interface is due to the high heating power increasing the temperature gradient. High heating power increases the electromagnetic stirring ability, which increases the time to reach stable growth. Tensile properties of the directionally solidified alloy are higher than those of the as‐cast alloy under the same testing temperature, e.g., the tensile strength is 342.5 MPa, an increase of 1.4 times, and the tensile strain is 4.4%, an increase of 1.3 times at 950 °C. This shows that the tensile properties and microstructure of TiAl‐based composites can be improved by the directional solidification technology.

show abstract

Scaling relationships of elastic-perfectly plastic film/coating materials from small scale sharp indentation

Wang

et al. 2021

Sci. China Technol. Sci.

View full text Add to dashboard Cite

Micro- and macroscopic plastic flow responses in high Nb-containing TiAl alloy by nanoindentation

Cited by 7 publications

References 43 publications

An indentation method for determining the film thickness, Young’s modulus, and hardness of bilayer materials

An indentation method for determining the film thickness, Young’s modulus, and hardness of bilayer materials

Effects of Heating Power on Microstructure Evolution and Tensile Properties at Elevated Temperature by Directional Solidification for Ti2AlC/TiAl Composites

Scaling relationships of elastic-perfectly plastic film/coating materials from small scale sharp indentation

Contact Info

Product

Resources

About