Steels: TRIP-assisted steels
Channel: bhadeshia123
Date: 2022-03-06

Solid-state phase transformation during the course of deformation in tension, can retard the onset of plastic instability, i.e. the necking that leads to ultimate failure. The mechanism by which this occurs is explored, somewhat quantitatively, to illustrate that the transformation strains themselves make only a minor contribution. Instead, it is the production of high-carbon, hard martensite, that is responsible for enhancing the work-hardening rate that in turn delays the onset of necking. 

A variety of other issues are discussed, for example the contrast between TRIP steels and those that are TRIP-assisted.

Associated teaching materials can be found on:
http://www.phase-trans.msm.cam.ac.uk/teaching.html
H. K. D. H. Bhadeshia