Experimental determination of TRIP-parameter K for mild- and high-strength low-alloy steels and a super martensitic filler material

Sebastian Neubert; Andreas Pittner; Michael Rethmeier

doi:10.1186/s40064-016-2474-0

Experimental determination of TRIP-parameter K for mild- and high-strength low-alloy steels and a super martensitic filler material

Springerplus. 2016 Jun 17;5(1):754. doi: 10.1186/s40064-016-2474-0. eCollection 2016.

Authors

Sebastian Neubert¹, Andreas Pittner¹, Michael Rethmeier¹

Affiliation

¹ Department 9.3 - Component Safety/Welding Technology, BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.

Abstract

A combined experimental numerical approach is applied to determine the transformation induced plasticity (TRIP)-parameter K for different strength low-alloy steels of grade S355J2+N and S960QL as well as the super martensitic filler CN13-4-IG containing 13 wt% chromium and 4 wt% nickel. The thermo-physical analyses were conducted using a Gleeble (®) 3500 facility. The thermal histories of the specimens to be tested were extracted from corresponding simulations of a real gas metal arc weldment. In contrast to common TRIP-experiments which are based on complex specimens a simple flat specimen was utilized together with an engineering evaluation method. The evaluation method was validated with literature values for the TRIP-parameter. It could be shown that the proposed approach enables a correct description of the TRIP behavior.

Keywords: Gleeble experiments; High-strength low-alloy steel; Phase transformation; Super martensitic filler material; Thermo physical simulation; Transformation induced plasticity (TRIP).