911 research outputs found
D.H. Lawrence, La Volpe, traduzione e cura di Stefania Michelucci, edizione bilingue
No full textIt is the bilingual and critical edition of D.H. Lawrence's The Fox in the series, Elsinore, Collana di Classici Inglesi, edited and translated by Stefania Michelucci
The volume consists of a long introduction to the text, pp 11-37, of a biographical article on the author and his work (l'autore e l'opera), pp. 39-45), of a note to the text (pp. 47-48) (English and Italian, page to page, pp. 49-227) of explicatory notes (pp. 229-243) and of a biographical section (pp. 245-252)
Improving Surface Quality and Fatigue Life of Electron Beam Melted Ti6Al4V by Chemical Machining
No full textDue to the high demand for innovative parts from the aerospace, biomedical, and automotive industries, 3D printing of titanium parts is widely researched. Electron beam melting (EBM) is one of the few additive manufacturing techniques that can quickly generate high density components. However, additive manufacturing techniques based on powder beds are characterized by subpar surface finishing, which also results in poor mechanical performances that are not suitable for industrial standards. Thus, surface finishing post processing is generally needed. Since fatigue behavior is strongly affected by surface quality, this work aims to highlight how chemical machining impacts this type of mechanical response. Rotating fatigue beam testing method has been chosen for the experimental campaign since it intrinsically stresses more the sample surfaces, in this way the effect of surface finishing is highlighted
Superplastic forming/diffusion bonding of a titanium alloy for the realization of an aircraft structural component in multi-sheets configuration
No full textSuperplastic forming and diffusion bonding (SPF/DB) is a near-net-shape forming and
joining process used with alloys having superplastic properties in order to make manufact which
should have light weight and high stiffness. The aerospace is one of those sectors in which such
technology is mainly used. This process allows to reduce the buy-to-fly ratio and consequently the
production costs thanks to the possibility to produce complex shape components in a single shot.
The material widely used for this application is the Ti-6Al-4V alloy for its high strength vs weight
ratio, excellent mechanical proprieties, corrosion resistance and galvanic compatibility with carbon
fiber reinforced composite materials. In this study, finite element analysis of the SPF/DB process
has been carried out in order to investigate the thickness prediction, the optimization of the tooling’s
geometry and the definition of the sheets initial thickness in the blow forming process of a multisheets
configuratio
Influence of processing parameters on microstructure and roughness of electron beam melted Ti-6Al-4V titanium alloy
No full textThe effect of heat input rate, hatch spacing, and focus offset upon microstructure, hardness, and roughness of EBM-manufactured Ti- 6Al-4V titanium alloy was studied via a factorial experiment. It had been found that a coarser microstructure is generated for high heat input and low line offset. Increasing the heat input or conversely decreasing the line offset leads to a higher lath thickness with consequent lower hardness. The roughness of the top surfaces decreases with the increase of the heat input and the focus offset or with the decrease of the line offset. On the other side the roughness of the side surfaces is dependant only from the heat input and it is proportional to the latter
Energy consumption assessment in manufacturing Ti6Al4V electron beam melted parts post-processed by machining
No full textComparison of specific cutting energy in dry and wet post- process turning of Ti6Al4V EBM parts
No full textTechnological and sustainability implications of wet and dry turning of Ti6Al4V EBM parts
No full text
- …
