In this work, the variant selection of martensite in a stainless maraging steel was investigated by electron backscattering diffraction and new protocol parent phase reconstruction. The reconstruction enables digital austenite reversion into prior microstructure provides information from large number grains. It found that strong occurred when grains were significantly refined annealing or sever...

CRYSTALLINE MICROSTRUCTURE SÖREN BARTELS AND ANDREAS PROHL ABSTRACT. This paper addresses the numerical approximation of microstructures in crystalline phase transitions without surface energy. It is shown that branching of different variants near interfaces of twinned martensite and simple austenite phases leads to reduced energies in finite element approximations. Such behavior of minimizing ...

The microstructure and martensitic transformation in the Ni-36.3Al-0.1Y (in at.%) alloy were investigated after ho~nogenisation and plastic deformation by hot upsetting at 1100°C. The alloy exhibited large, recrystallised grains of the Ni-A1 P phase wit11 spl~erical precipitates inside the grains and a thin layer of other phases located at the grain boundaries. The SEM and EDX analysis showed t...

A multiphase nanostructured ZrCu-base bulk alloy which showed a unique microstructure consisting of sub-micrometer scale Zr₂Cu solid solution, nano-sized twinned plate-like ZrCu martensite (ZrCu (M)), and retained ZrCu (B2) austenite was fabricated by copper mold casting. The observation of periodic morphology evolution on the fracture surface of the multiphase nanostructured ZrCu-base alloys h...

This paper describes the main results obtained from a detailed experimental investigation into dislocation and twinned structures that develop in dual phase (DP) steel sheets. In particular, morphology defect-structures present DP 1180 having 55% ferrite 45% martensite, were examined using transmission electron microscopy (TEM). Microstructure of as-received consists twin-free martensite form l...

Abstract Deformation mechanisms activated during tensile deformation of nanocrystalline NiTi wire in martensite state were investigated by combination two experimental methods: (i) analysis the evolution martensite-variant microstructures grains deformed TEM and (ii) texture situ synchrotron X-ray diffraction. The obtained results are linked to activity various twinning processes martensite. It...