Promising Tensile and Fatigue Properties of Commercially Pure Titanium Processed by Rotary Swaging and Annealing Treatment

Abstract

The effect of the grain refinement and texture on tensile and fatigue properties in commercially pure titanium (grade 2) processed by rotary swaging (RS) and an annealing treatment is investigated. The as-processed sample consists of band-like grains on the longitudinal section and equiaxed grains on the transversal section and revealed an obvious <10-10> fiber texture with respect to the rod axis. Through this technique, a sample with a high tensile strength of 870 MPa, a high uniform elongation of 8.5%, and a high fatigue limit of 490 MPa can be achieved, and the tensile and fatigue properties are almost the same as those of a conventional Ti-6Al-4V alloy. The enhanced mechanical properties and plastic deformation mechanism are discussed in terms of the observed ultrafine-grained microstructure and strong fiber texture.

High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

“…By integrating warm ECAP and cold working, the residual ductility after ECAP can be 'converted' into strength via further grain refinement and/or dislocation hardening, as has been successfully demonstrated for Ti [20]. Particularly, for deformation processing of rods, rotary swaging (RS) is a well-established and promising deformation technique, which belongs to a family of radial hammer forging processes for axisymmetric rods [21][22][23]. The mechanics of the materials plastic flow during RS has been well understood and described [21].…”

“…Therefore, similarly to the vast majority of deformation processes, rotary swaging is accompanied by grain refinement, which in turn results in the corresponding enhancement of mechanical properties, depending on processing parameters such as temperature and extrusion ratio. While Wang et al [23] and ALkhazraji et al [24] have successfully applied RS to fabricate high strength Ti rods, Müller et al [25], Gan et al [26,27], and Minarik et al [28] have convincingly demonstrated the viability of warm RS for deformation processing of commercial as-cast pure Mg, AZ31, and AE42 magnesium alloys.…”

Structure and Properties of High-Strength Ti Grade 4 Prepared by Severe Plastic Deformation and Subsequent Heat Treatment

“…The main advantage of these methods is that they allow continuous production [9]. The combination of Conform SPD with rotary swaging was also found to be very effective [10,11]. The Conform SPD process can be in simplification described as continuous (and because of this industrially applicable) variation on equal channel angular pressing (ECAP), which is well described technology, combined with conform process (continuous extrusion).…”

Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling

“…Their results proved that the {0001} base texture can improve the plasticity of the sheet, and the transverse tensile strength of the sheet was higher. Wang et al [ 19 ] found that rotary swaging (RS) and the following annealing treatment have great effect on the grain refinement and texture, and elucidated the mechanism of the ultrafine-grained microstructure and strong fiber texture of improving mechanical properties. Impact toughness is an important index to evaluate the ability of materials to absorb plastic deformation under impact load, and to reflect the materials’ impact resistance [ 20 ].…”