Particle impact damage in the gamma based TiAl alloy TNBV3B produced via three different processing routes

Gebhard, Susanne; Peters, P.W.M.; Roth‐Fagaraseanu, Dan; Turley, Felix; Voggenreiter, Heinz

doi:10.1016/j.msea.2010.05.072

Cited by 3 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More details about the damage behavior of the three TNBV3B alloys under investigation are given in ref. [10] Residual Tensile Strength Figure 3 shows the residual strength after a center impact in dependence of the impact energy for tapered flat specimens of all three TNBV3B alloys and a thickness of 2.5 mm. The graph S. Gebhard et al/Influence of Impact on the Mechanical Behaviour .…”

Section: Impact Damage Evolutionmentioning

confidence: 99%

“…The approximately isotropic properties of the cast material result in a star-like crack network with about equally long cracks extending in random directions. [10] Specimens which experience impacts with a low energy not leading to backside cracks also show a reduced residual strength. This is shown in Figure 4(a), which indicates a reduction of the residual strength of 5 mm thick center impacted specimens up to 51% of the UTS for an impact energy of 2.2 J solely through effects present near the indent.…”

Section: Impact Damage Evolutionmentioning

confidence: 99%

“…[10] After fatigue failure of the impacted specimen the fracture surfaces were investigated with a scanning electron microscope. For the extruded TNBV3B alloy, the fracture surface due to impact and the fracture surface due to fatigue could be clearly distinguished as the latter showed a smoother surface, whereas for the cast and the forged TNBV3B alloys the impact induced fracture surface had to be estimated with the help of the crack dimensions measured on the front and the backsides before fatigue testing.…”

Section: Residual Fatigue Strengthmentioning

confidence: 99%

“…These three types of processing of this alloy result in very different microstructures and mechanical properties affecting the impact behavior significantly as already shown in a previous work. [ 10] The tensile and the fatigue behavior after impact damage is studied and described as a function of the damage extend. The deformation hardened zone is investigated making use of micro-hardness tests resulting in a deformation map of the cross section of a specimen through an impact indent and its influence on the mechanical behavior is evaluated.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Influence of Impact on the Mechanical Behaviour of the Gamma‐Based TiAl Alloy TNBV3B

et al. 2011

Self Cite

View full text Add to dashboard Cite

The quasi‐static and fatigue behavior after impact of the TiAl alloy TNBV3B produced via three different processing routes—cast, forged and extruded—has been studied on flat and airfoil‐like shaped specimens making use of ballistic impact experiments. For impacts resulting in cracks the behavior can be described using a linear‐elastic fracture mechanics approach. The residual strength is described on the basis of the fracture toughness. The residual fatigue strength of impact‐cracked specimens is estimated on the basis of the threshold for crack growth of the TNBV3B alloys. However, when there is no visible crack or when the crack length is below the size of the deformed impact area, residual stresses and micro‐damage play a dominating role making the linear‐elastic fracture mechanics approach invalid. The deformation hardened zone in TiAl has been studied making use of micro‐hardness tests showing their extension and the degrees of deformation for different impact energies.

show abstract

Section: Impact Damage Evolutionmentioning

confidence: 99%

Section: Impact Damage Evolutionmentioning

confidence: 99%

Section: Residual Fatigue Strengthmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations