Texture and grain boundary structure in Tungsten—I. Texture types and the primary misorientation function

✍ Scribed by D.E. Fleet; P.I. Welch; P.R. Howell

• Publisher: Elsevier Science
• Year: 1978
• Weight: 810 KB
• Volume: 26
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(78)90058-5

✦ Synopsis

This paper. and its two companions. investigate the relationship hctween the crystallographic texture exhibited by commercially doped powder metallurgy (C.D.P.M.) tungsten wires and rods and the nature of the grain boundaries within the material. It is shown that the strong wire texture of tungsten leads to a high probability of observing certain boundary types. i.e. those which may he characteriscd by b, and/or planar matching dislocations. This paper defines a series of possthlc wire textures. and uses this textural modelling to predict the relationship between certain crystallographic directions in adjacent grains. R&urn& Dans cet article. et dans les deux qui l'accompagnent. on etudie la relation entrc la texture cristallographique de fils et de harrcs commerciaux de tungstene prCparCs en m&tallurgie dcs poudres et dopCs (C.D.P.M.). et la nature dcs joints de grains dans cc matCriau. On montrc quc la forte texture de fihrc du tungstPne conduit h une forte probabilitC d'observer certains types de joints. tcls ceux que I'on peut caracteriser par dcs dislocations b, et;ou des dislocations d'accommodation plane. On definit dans cct article un certain nombre de textures de fil possibles. et on les utllisc pour prt-voir la relation cntre certaincs directions cristallographiques dans les grains adjacents.