.hot metal gas forming of tubes can be used in various industries such as automotive and aerospace industries. in this process tube is formed at elevated temperatures, by using gas instead of fluid pressure. lower required pressure and low power are its advantages in comparison to hydroforming process. in this paper, a hot metal gas bulging process of an aluminum alloy tube has been investigate...

In the title compound, C15H10ClN3O2, the benzene ring is slightly twisted out of the plane of the 2,3-di-hydro-1H-indole ring system (r.m.s. deviation = 0.007 Å), forming a dihedral angle of 7.4 (3)°. An intra-molecular N-H⋯O hydrogen bond forms a six-membered ring. In the crystal, mol-ecules are linked via N-H⋯O and C-H⋯O hydrogen bonds, forming layers alternately perpendicular to [011] and [0...

In the title complex, [Fe(II)Fe(III) 2(C9H10BN6)2(CN)6(CH3OH)4]·2CH3OH, two [Fe(III)(Tp)(CN)3](-) anions [Tp is hydro-tris-(pyrazoylborate)] are bridged by an [Fe(II)(MeOH)4](2+) cation, forming a centrosymmetric trinuclear unit. These units are connected via O-H⋯O and O-H⋯N hydrogen bonds involving the uncoordinated methanol solvent mol-ecules, forming a three-dimensional network.

Cold drawing process is one of the most used metals forming processes in industries for forming seamless tubes. This process of plastic deformation of metals occurs below the recrystallization temperature and is generally performed at room temperature. When metal is cold worked, upon the release of forming force, the springback occurs. In this paper, the springback effect of the seamless tube t...

The title compound, C(23)H(22)O(8), is a binary benzoyl ester whose nucleus consists of a fused system made up of a methyl-enedi-oxy ring and two tetra-hydro-furan rings. One of the benzoyl ester groups is attached at the junction of the two tetra-hydro-furan rings. The other is attached to the outer tetra-furan ring. Both the benzoyl ester groups are in an axial conformation with respect to th...

The title compound {systematic name: 2-[7-fluoro-3,4-di-hydro-3-oxo-4-(prop-2-yn-1-yl)-2H-1,4-benzoxazin-6-yl]-4,5,6,7-tetra-hydro-1H-iso-indole-1,3(2H)-dione}, C19H15FN2O4, is a dicarboximide herbicide. The dihedral angle between the male-imide and benzene ring planes is 66.13 (5)°. In the crystal, C-H⋯O and C-H⋯F hydrogen bonds and weak C-H⋯π inter-actions [3.5601 (19) Å] link adjacent mol-ec...

The title compound, C23H25N3O4, {systematic name: 1-benzyl-4-[(3aR,5R,6R,6aR)-6-benz-yloxy-2,2-di-methyl-tetra-hydro-furo[2,3-d][1,3]dioxol-5-yl]-1H-1,2,3-triazole}, consists of a substituted 2,2-di-methyl-tetra-hydro-furo[2,3-d][1,3]dioxole. The furan-ose ring adopts an envelope conformation close to C 3-exo, where the C atom substituted by the benz-yloxy group is the flap. The fused dioxolane...

In the title compound, C30H29BrN2O5, the β-lactam ring is essentially planar, with the O atom displaced from this plane by 0.856 (9) Å, and forming dihedral angles of 24.35 (13) and 89.42 (14)° with the planes of the benzene substituent groups on this ring. The tetra-hydro-pyran ring adopts an envelope conformation with the C atom bearing the β-lactam ring as the flap. In the crystal, weak C-H⋯...

light-weight and high strength alloys such as al-mg alloys are used in order to reduce the weight of industrial components. however these materials should be formed at elevated temperatures due to their poor formability at room temperature. hot metal gas forming is one of the high-tech forming processes that is used to solve this problem. recent investigation on tube hydroforming showed positiv...

Tube spinning is an effective plastic-forming technology for forming light-weight, high-precision and high-reliability components in high-tech fields, such as aviation and aerospace. However, cracks commonly occur in tube spinning due to the complexity of stress state, which severely restricts the improvement of the forming quality and forming limit of components. In this study, a finite elemen...