| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Processing—Microstructure—Property Relationships of Titanium and Titanium Alloys
|
| Presentation Title |
Computational Polarized Light Microscopy for Orientation-based Quality Control |
| Author(s) |
Dan P. Satko, Thomas Carmody, Chasen Ranger, Sesh Tamirisakandala, Matthew Dahar, Ayman Salem |
| On-Site Speaker (Planned) |
Dan P. Satko |
| Abstract Scope |
Heterogenous spatial distribution of alpha phase crystallographic orientation could result in detrimental effects on fatigue life in wrought titanium alloys and large scatter in the properties of additively manufactured components. While EBSD provides accurate data, its utility towards understanding texture heterogeneities at the component scale is limited to smaller areas due to the high cost of measurement and stringent sample requirements. We are presenting an alternative technique based on computational polarized microscopy that can cover 1000s of mm2 with sub-micrometer resolution. Due to the big data generated, quantitative data analytics are discussed with an emphasis on the use of machine learning for establishing orientation-based metrics for quality control. Case studies are presented for wrought alpha/beta titanium and additively manufactured by laser and electron beam powder bed fusion and wire arc additive manufacturing. Automated feature extraction of alpha laths, alpha colonies, alpha grains, and microtextured regions are presented. |