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Notch effects on tensile behavior of Ni3AI and Ni3AI + B

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Abstract

Tensile tests have been carried out at room temperature on double-notched specimens of Ni3Al and Ni3Al containing boron to observe the effect of boron on the notched specimen tensile behavior of Ni3Al. The results indicate that a predominantly intergranular fracture can be induced in the presence of a high constraint (notch), even in boron-doped Ni3Al, although a finite elongation and transgranular tearing-type fracture near the notch root were also observed. Fracture initiation was observed to occur in a brittle intergranular fashion in regions ahead of the notch in notched specimens of both Ni3Al and Ni3Al microalloyed with boron. An increase in the intergranular fracture stress of Ni3Al due to boron was noted from the semiquantitative analysis (based on existing finite element models) of the notched tensile specimen data.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Case Western Reserve University, 44106, Cleveland, OH

    P. S. Khadk1Kar (Research Associate), J. J. Lewandowski (Assistant Professor) & K. Vedula (Assistant Professor)

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  1. P. S. Khadk1Kar
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  2. J. J. Lewandowski
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  3. K. Vedula
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Khadk1Kar, P.S., Lewandowski, J.J. & Vedula, K. Notch effects on tensile behavior of Ni3AI and Ni3AI + B. Metall Trans A 20, 1247–1255 (1989). https://doi.org/10.1007/BF02647407

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  • DOI: https://doi.org/10.1007/BF02647407

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