Articles written in Bulletin of Materials Science
Volume 10 Issue 3 May 1988 pp 205-216
Variations in the halfwidth values of X-ray reflections from fatigue-cycled, polycrystalline aluminium samples have been analysed. An oscillatory variation of the halfwidths with fatigue cycling has been observed. Analysis of the diffraction line profiles indicates that broadening arises mainly because of the build-up of microstrains during fatigue cycling. The present data indicate that (i) broadening due to fatigue cycling increases with glancing angle; (ii) changes in halfwidth and integral widths, due to fatigue cycling, are comparable and (iii) (
Volume 22 Issue 1 February 1999 pp 1-7 Rapid Communication
Axially compressed Kevlar 49 fibres have been examined by X-ray diffraction methods. The most prominent effect of axial compression is the anisotropic deformation of the unit cell. Whereas the
Volume 22 Issue 7 December 1999 pp 1013-1023 Composite Materials
The structural changes which accompany decomposition of Kevlar 49 fibres at
Volume 23 Issue 3 June 2000 pp 211-214
Volume 25 Issue 4 August 2002 pp 341-346 Polymers
Thermally aged Nomex fibres manifest several residual effects viz. reduction in X-ray crystallinity, weight loss and deterioration in tensile characteristics. Surface damages in the form of longitudinal openings, holes, material deposits etc have also been observed. Based on the data from thermally exposed fibres, the time needed for states of zero tensile strength and modulus have been predicted.
Volume 27 Issue 1 February 2004 pp 47-50 Polymers
The occurrence of space group forbidden reflections in the X-ray diffraction patterns from the aramid PPTA has been correlated with the presence of stacking faults. The fraction of sample affected by the presence of such faults has also been estimated.
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