Is it Possible to Use Rolling Methods to Improve Textures on Fe–Mn–Si Shape Memory Alloys?

Abstract

No uniform rolling deformation produces shear strains that give rise to textural and microstructural heterogeneities in processed metals and alloys. In this work, the authors investigate Fe-30Mn-4Si shape memory alloy sheets rolled in different conditions at 600 C, in order to determine the process giving rise to the best structure and the strongest {100}<110> shear texture. This crystallographic orientation is the most favorable for the g ! e martensitic transformation, which provides the shape memory effect in these alloys. In the current conditions, the authors find that unidirectional rolling produces a shear texture in sheet's surface layers. The authors compare the texture and microstructure from this process to those obtained from reverse rolling and single-roller drive rolling.

Crystallographic Peculiarities of β-α Transformation in Brass Induced by Hot Extrusion

“…EBSD data show that the texture of β-phase consists of the 8 scattered components: two very strong close to (011)[0-11], (110) [1][2][3][4][5][6][7][8][9][10] The analysis of crystallographic relationship (OR) of the texture components of β-and α-phases demonstrate that they may all be obtained, in accordance with the orientation relations, which are intermediate between the Kurdjumov-Sachs (K-S) and Nishiyama-Wasserman (N-W) types (Fig. 3, a, b).…”

“…Anisotropy of strength and plasticity properties, determined by crystallographic and morphologic textures, is an important factor to be taken into account for manufacture and certification of rolled products [5,[8][9][10]. Also in case of clear crystallographic texture of the product anisotropy of any other functional properties can change significantly, in some cases catastrophic.…”

Comparison of a low carbon steel processed by Cold Rolling (CR) and Asymmetrical Rolling (ASR): Heterogeneity in strain path, texture, microstructure and mechanical properties

“…GNDs are due to the contribution of two components. One associated with dislocations building disorientations (𝜌 WG ) and one more associated to the Curvature-Induced Dislocations (CIDs) as equation (5) indicates [37]:…”

“…Cold rolling (CR) is a quite well-known metal forming process used in the industry to produce plane materials [4,5], which can be obtained without length dimension restrictions in comparison with the Severe Plastic Deformation (SPD) process where the material final dimensions still represent a big challenge for their incorporation at the industrial level. CR process presents another advantage which is the easy combination with other SPD techniques, given rise to mixed new processes [6,7].…”

Features of shear transformation texture in seamless pipes

“…This leads to the formation of a crystallographic microstructure. The occurrence of texture results in a set of orientation-dependent physical and mechanical properties, which should be taken into account in the development of new and improvement of existing technologies [1,2].…”