Study on compression deformation, damage and fracture behavior of TiAl alloys: Part I. Deformation and damage behavior

Cao, Rui; Li, L.; Chen, J.H.; Zhang, J.; He, Hongliang

doi:10.1016/j.msea.2010.01.011

Cited by 15 publications

(14 citation statements)

References 10 publications

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“…Figure 9.58a and b show the configurations of actual cracks produced in DP specimens that were compression-fractured at strain rates of 2 × 10 −2 s −1 (DP3-09) and 1 × 10 −5 s −1 (DP3-50), respectively. Contrary Tensile stress-strain curves measured in specimen with cracks produced by preloading compression stress of 900 MPa (2), 1800 MPa (3) and measured in specimen without cracks (1) (Cao et al, 2010b).…”

Section: Figure 954mentioning

confidence: 95%

“…When the σ unload reaches 2198 MPa, close to the ultimate compression stress (σ uc ), on the surface of unloaded specimens, the deformation is very heavy. The interlamellar slip bands are more obvious (shown by arrow 7 in Figure 9.53e); some translamellar cracks along the compression direction Engineering stress-strain curves measured in compression and tensile tests for FL3 (a) and DP3 (b) (Cao et al, 2010a). (Cao et al, 2010a). were widened (shown by arrow 6 in Figure 9.53e).…”

Section: Crack Initiation and Propagation Behaviors In Compressionmentioning

confidence: 99%

“…The interlamellar slip bands are more obvious (shown by arrow 7 in Figure 9.53e); some translamellar cracks along the compression direction Engineering stress-strain curves measured in compression and tensile tests for FL3 (a) and DP3 (b) (Cao et al, 2010a). (Cao et al, 2010a). were widened (shown by arrow 6 in Figure 9.53e). The number of cracks increase and the longitudinally oriented cracks are widened and buckled.…”

Section: Crack Initiation and Propagation Behaviors In Compressionmentioning

confidence: 99%

“…Engineering stress-strain curves measured in specimens reloaded and fractured after single preloading-unloading processes at various preloading stresses (σ unload ) for FL3 (a) and DP3 (b) TiAl alloys, the values of stress present the unloaded values (Cao et al, 2010b). 9.6 COMPRESSION FRACTURE MECHANISM OF TiAl ALLOYS FL3 and DP3 TiAl alloys (Cao et al, 2010b).…”

Section: Figure 954mentioning

confidence: 99%

“…9.6 COMPRESSION FRACTURE MECHANISM OF TiAl ALLOYS FL3 and DP3 TiAl alloys (Cao et al, 2010b). The data of mechanical properties measured in reloading tests after single compression PU processes at various stresses, σ unload , are shown in Table 9.7 for FL3 and Table 9.8 for DP3.…”

Section: Figure 954mentioning

confidence: 99%

See 4 more Smart Citations

Brittle Fracture of TiAl Alloys and NiTi Memory Alloys

Chen¹,

Cao²

2015

Micromechanism of Cleavage Fracture of Metals

Self Cite

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Section: Figure 954mentioning

confidence: 95%

Section: Crack Initiation and Propagation Behaviors In Compressionmentioning

confidence: 99%

Section: Crack Initiation and Propagation Behaviors In Compressionmentioning

confidence: 99%

Section: Figure 954mentioning

confidence: 99%

Section: Figure 954mentioning

confidence: 99%

See 3 more Smart Citations

Brittle Fracture of TiAl Alloys and NiTi Memory Alloys

Chen¹,

Cao²

2015

Micromechanism of Cleavage Fracture of Metals

Self Cite

View full text Add to dashboard Cite

A Comparative Study on Microstructure and Mechanical Properties of Ti‐43/46Al–5Nb–0.1B Alloys Modified by Mo

et al. 2019

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To improve mechanical properties of TiAl-Nb alloys and obtain effects of Al content on microstructure, Ti-43/46Al-5Nb-0.1B-xMo alloys are prepared. Phase constitution, macro-/microstructure volution, and mechanical properties of them are investigated systematically and compared in detail. Results show that the lamellar colony size refines, B2 phase increases and Al-segregation in interdendritic regions aggravates with the increase in Mo content. The increased B2 phase is attributed to the increased Mo segregated at the grain boundaries during β/α transformation, and the aggravated Al-segregation is attributed to the increased Al rejected into the interdendritic areas during L/β solidification. Compressive results show that the strength and strain increase about 150 MPa and 6% when the Mo content increases to 0.8 at% for Ti-43Al-5Nb-0.1B-xMo alloys; they increase about 343 MPa and 4% when Mo content increases to 1.2 at% for Ti-46Al-5Nb-0.1B-xMo alloys. Both the strength and strain decrease when Mo content further increases. The grain refinement strengthening and solid solution strengthening caused by Mo are contributed to the improved strength and strain. However, excessive B2 phase and severe Al-segregation deteriorate the mechanical properties of the alloys, which act as the cracking sources.

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Development of a heat treatment strategy for the γ-TiAl based alloy TNM-B1 to increase the hot workability

et al. 2019

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Currently, TiAl turbine blades produced by isothermal forging are commercially used in aircraft jet engines. The limited workability of the HIPed microstructure causes long processing times because of low ram speeds and excessive wear on the costly molybdenum tools due to high forging stresses and temperatures. By introducing a multi-step heat treatment into the industrial forging chain, the formability of the material can be improved, leading to lowered production costs. In this work, the parameters of interest for improved formability are increased β/β 0 phase fractions, increased cellular phase fractions and reduced proportions of lamellar colonies. Several two-step heat treatments were investigated. The parameters of interest were then measured and compared. Subsequently, compression tests were carried out for the most promising heat treatments. It could be shown that a flow stress reduction of around 10% can be achieved by one of these heat treatments (1300 °C/1 h/AC + 1100 °C/5 h/AC). For this heat treatment, reproducibility was also checked using differential scanning calorimetry.

show abstract

Study on compression deformation, damage and fracture behavior of TiAl alloys: Part I. Deformation and damage behavior

Cited by 15 publications

References 10 publications

Brittle Fracture of TiAl Alloys and NiTi Memory Alloys

Brittle Fracture of TiAl Alloys and NiTi Memory Alloys

A Comparative Study on Microstructure and Mechanical Properties of Ti‐43/46Al–5Nb–0.1B Alloys Modified by Mo

Development of a heat treatment strategy for the γ-TiAl based alloy TNM-B1 to increase the hot workability

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