3 papers
physics.app-ph2021
Weighted ellipse fitting routine for spotty or incomplete Debye-Scherrer rings on a 2D detector
Phani S. Karamched, Yi Xiong, Chi-Toan Nguyen +3
We introduce a weighted ellipse fitting routine to measure Debye Scherrer rings acquired on 2D area detectors and demonstrate its use in strain determination. The method is relativ…
cond-mat.mtrl-sci2020
An in-situ synchrotron diffraction study of stress relaxation in titanium: Effect of temperature and oxygen on cold dwell fatigue
Yi Xiong, Phani S. Karamched, Chi-Toan Nguyen +5
There is a long-standing technological problem in which a stress dwell during cyclic loading at room temperature in Ti causes a significant fatigue life reduction. It is thought th…
cond-mat.mtrl-sci2020
Cold Creep of Titanium: Analysis of stress relaxation using synchrotron diffraction and crystal plasticity simulations
Yi Xiong, Phani Karamched, Chi-Toan Nguyen +4
There is a long standing technological problem in which a stress dwell during cyclic loading at room temperature in Ti causes a significant fatigue life reduction. It is thought th…