Output details
12 - Aeronautical, Mechanical, Chemical and Manufacturing Engineering
University of Manchester : B - Mechanical, Aerospace and Manufacturing Engineering
Characterizing Phase Transformations and Their Effects on Ferritic Weld Residual Stresses with X-rays and Neutrons
This work was carried out in collaboration with Cambridge University. It illustrates how both neutron diffraction and synchrotron X-ray diffraction can play an important and complementary role in assisting the design of novel weld filler metals. Such filler metals exploit the fact that solid-state phase transformations have a strain associated with them. On cooling after welding, this strain can compensate for or offset thermal contraction strains, and thus mitigate residual stresses. Through control of the filler metal chemistry, it is possible to engineer advantageous residual stress distributions in welds, by achieving a specific martensite-start temperature on cooling after welding.
