| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Metallurgy
|
| Presentation Title |
Reducing the Effects of Texture on Phase Fraction Measurement of Retained Austenite Using X-ray Diffraction |
| Author(s) |
Michael R. Cox, Adam A. Creuziger, Kip O. Findley |
| On-Site Speaker (Planned) |
Michael R. Cox |
| Abstract Scope |
High error has been observed in X-ray diffraction phase fraction measurements of retained austenite in rolled sheet steel. The suspected cause of this error is the textured nature of rolled materials. A novel, hexagonal grid sampling method has been investigated via numerical simulation and experimentation. The method samples the rolling, transverse, and normal direction-containing quadrant of the pole figure to reduce texture-based bias error in the measurement. Simulated measurements used texture data from four rolled sheet steels, one of which was used for experimental trials. Single-vector based measurements present significant bias error in both simulated and experimental trials. On the other hand, the hex-scheme measurements found phase fractions comparable to neutron diffraction results using over three hundred diffraction vectors. Using a hex-scheme containing only four diffraction vectors, a retained austenite phase fraction was measured within 1 percent volume of the prior neutron diffraction data on the same duplex steel sheet. |