@inproceedings{0d51dc4268b348999c50a91adf2ff1db,
title = "Fracture toughness of intermetallics using a micro-mechanical probe",
abstract = "A novel technique for determining the fracture toughness of brittle intermetallics is presented, wherein very small samples are used and multiple tests are easily conducted on a flat polished surface. The fracture toughness of single crystal NiAl and polycrystalline Al3Sc are evaluated with this continuous microscratch technique at scratch rates ranging from 0.5 to greater than 100 μm S-1. For comparison, small compact tension samples of {100} 〈100〉 NiAl are evaluated at applied stress intensity rates ranging from 1.5 to 5400 MPa-m 1/2 s-1. Good comparison of microscratch toughness to compact tension KIc values are obtained in this study for {001} 〈100〉 NiAl, 10.6 vs. 10.0 MPa-m 1/2 , from the literature for {001} 〈110〉, 13.5 vs. 12.2 MPa-m 1/2 , and from the literature for polycrystalline Al3Sc, 3.5 vs 3.1 MPa-m 1/2 . Also, the fracture toughness of both NiAl and Al3Sc are found to be strongly dependent on strain rate at room temperature with toughness dropping by an order of magnitude over a decade increase in rate. Possible reasons and implications to improving low temperature brittleness are discussed.",
author = "Gerberich, {W. W.} and Venkataraman, {S. K.} and Hoehn, {J. W.} and Marsh, {P. G.}",
year = "1993",
month = dec,
day = "1",
language = "English (US)",
isbn = "0873392531",
series = "Proc First Int Symp Struct Intermet",
publisher = "Publ by Minerals, Metals & Materials Soc (TMS)",
pages = "569--576",
editor = "R. Darolia and J.J. Lewandowski and C.T. Liu and P.L. Martin and D.B. Miracle and {et al}, al",
booktitle = "Proc First Int Symp Struct Intermet",
note = "Proceedings of the First International Symposium on Structural Intermetallics ; Conference date: 26-09-1993 Through 30-09-1993",
}