|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Reorientation Induced Plasticity (RIP) in High-strength Titanium Alloys: An Insight into Underlying Mechanisms and Resulting Mechanical Properties
||Odeline Dumas, Loic Malet, Frederic Prima, Stephane Godet
|On-Site Speaker (Planned)
Titanium alloys for aerospace applications suffer from low work-hardening capabilities. Attempts to increase strain-hardening by combining non-conventional deformations mechanisms such as Transformation Induced Plasticity (TRIP) or Twinning Induced Plasticity (TWIP) often come with a drastic decrease in yield stress. In the present paper, we focus on Reorientation Induced Plasticity (RIP) within the martensite of alpha/alpha’ microstructures. They are shown to macroscopically exhibit very large hardening rates combined with large yield stress (typically over 800 MPa). The criteria triggering this new deformation mechanisms are scrutinized and analyzed by high resolution EBSD. It is shown that in order to enable reorientation, the martensite must exhibit (i) a critical amount of beta stabilizer elements, (ii) specific misorientation between neighbouring variants and (iii) a transformation strain that complies with the applied stress.