Elatresh et al. (1) (ECAHDB) claim that the lowtemperature martensitic structure of lithium “is not the heretofore assigned 9R.” This is based on comparing results of Fermi surface calculations to de Haas–van Alphen (dHvA) data from Springford and coworkers (2, 3). We note that Springford’s group took extensive steps to preserve the body-centered-cubic (bcc) structure and to avoid the temperatu...

The hysteresis loop, described during the formation of stressinduced pseudoelastic martensite in a Cu-Zn-A1 betaphase single crystal, was studied as a function of strain-rate, deformation amplitude and temperature. The aPtm, the stress at which the transformation starts at a given constant temperature, is strain-rate independent but the hysteresis described by the stress-strain curve shows a ma...

In recent years, TRIP/TWIP steels have been the focus of great attention thanks due to their excellent tensile strength-ductility combination. The compression tests were performed at different temperatures from 25 to1000°C to study the mechanical behavior of advanced austenitic steel with 21% manganese plus bearing Ti. The results indicated that the plastic deformation is controlled by deformat...

The paper discuss the nomenclature of martensites in the P-phase alloys and proposes to continue to use the current nomenclature with emphasis on the correct interpretations in terms of stacking sequence of the basal planes and the true symmetry of the martensite structure. In their paper "New description of Long Period Stacking Order Structures of Martensites in J3-Phase Alloys" Otsuka et al [...

this paper provides an overview on obtaining low-carbon ultra-fine grained dual-phase steels through rapid intercritical annealing of cold-rolled sheet as improved materials for automotive applications. a laboratory processing route was designed that involves cold-rolling of a tempered martensite structure followed by a second tempering step to produce a fine grained aggregate of ferrite and ca...

A workshop has explored interactions of materials science, applied mechanics, physics and mathematics in understanding fundamentals of martensitic transformations. System theory offers a framework for addressing realistic complexity. Theory of invariant-plane kinematics has been extended to multivariant plate groups and hierarchical structures. Electronic total energy calculations explore the o...

In this paper, a medium-frequency inverter spot welder was used for resistance spot-welding experiments on 980 MPa grade cold-rolled δ-TRIP(Transformation-induced Plasticity) steel. The effects of the tempering process morphology, microstructure, element distribution, and properties spot-welded joints were studied by Scanning Electron Microscope (SEM), Transmission Microscopy (TEM), Electron-Pr...