Related Research Articles
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys.
Fiberglass or fibreglass is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic.
Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene.
Barium hydroxide is a chemical compound with the chemical formula Ba(OH)2. The monohydrate (x = 1), known as baryta or baryta-water, is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form.
Shot peening is a cold working process used to produce a compressive residual stress layer and modify the mechanical properties of metals and composites. It entails striking a surface with shot with force sufficient to create plastic deformation.
Metalworking hand tools are hand tools used in the metalworking field, powered entirely by the operator. There are lots of tools, fit for different actions to the material, such as shrinking or modifying its surface.
Hydrogen fluoride (fluorane) is an inorganic compound with chemical formula HF. It is a very poisonous, colorless gas or liquid that dissolves in water to yield an aqueous solution termed hydrofluoric acid. It is the principal industrial source of fluorine, often in the form of hydrofluoric acid, and is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers, e.g. polytetrafluoroethylene (PTFE). HF is also widely used in the petrochemical industry as a component of superacids. Due to strong and extensive hydrogen bonding, it boils at near room temperature, much higher than other hydrogen halides.
Nickel(II) iodide is an inorganic compound with the formula NiI2. This paramagnetic black solid dissolves readily in water to give bluish-green solutions, from which crystallizes the aquo complex [Ni(H2O)6]I2 (image above). This bluish-green colour is typical of hydrated nickel(II) compounds. Nickel iodides find some applications in homogeneous catalysis.
Allylamine is an organic compound with the formula C3H5NH2. This colorless liquid is the simplest stable unsaturated amine.
Strontium nitrate is an inorganic compound composed of the elements strontium, nitrogen and oxygen with the formula Sr(NO3)2. This colorless solid is used as a red colorant and oxidizer in pyrotechnics.
Ammonium aluminium sulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH4)Al(SO4)2·12H2O. It is used in small amounts in a variety of niche applications. The dodecahydrate occurs naturally as the rare mineral tschermigite.
Laser peening (LP), or laser shock peening (LSP), is a surface engineering process used to impart beneficial residual stresses in materials. The deep, high-magnitude compressive residual stresses induced by laser peening increase the resistance of materials to surface-related failures, such as fatigue, fretting fatigue, and stress corrosion cracking. Laser shock peening can also be used to strengthen thin sections, harden surfaces, shape or straighten parts, break up hard materials, compact powdered metals and for other applications where high-pressure, short duration shock waves offer desirable processing results.
In metallurgy, cold forming or cold working is any metalworking process in which metal is shaped below its recrystallization temperature, usually at the ambient temperature. Such processes are contrasted with hot working techniques like hot rolling, forging, welding, etc. The same or similar terms are used in glassmaking for the equivalents; for example cut glass is made by "cold work", cutting or grinding a formed object.
Barium sulfite is the inorganic compound with the chemical formula BaSO3. It is a white powder that finds few applications. It is an intermediate in the carbothermal reduction of barium sulfate to barium sulfide:
Steel abrasives are steel particles that are used as abrasive or peening media. They are usually available in two different shapes that address different industrial applications.
Metal Improvement Company LLC, part of Curtiss-Wright, is a company specializing in metal surface treatments.
An Almen round is a thin round disk used to quantify the intensity of a shot peening process. Developed in 1994 by Rudolf Bosshard in Switzerland, it is a modification of the Almen strip method, which is used worldwide as a surface treatment testing method in the field of shot peening. The basic principle is the same, but due to the simple shape and minimized size, the Almen round is more suitable for automated processing and installation on dummy rigs. Also instead of the Almen block according SAE J442, here a matching device is used and if connected to electronic processing unit, the Almen value according AMS-S-13165 can be evaluated in one run.
Sodium bifluoride is the inorganic compound with the formula Na[HF2]. It is a salt of sodium cation and bifluoride anion. It is a white, water-soluble solid that decomposes upon heating. Sodium bifluoride is non-flammable, hygroscopic, and has a pungent smell. Sodium bifluoride has a number of applications in industry.
Shot peening can be used to recondition distorted steel conveyor belts. The shot peening process is quick and cost-effective compared with other methods and does not interrupt daily production. A deformed steel belt has the following disadvantages:
In metallurgy, peening is the process of working a metal's surface to improve its material properties, usually by mechanical means, such as hammer blows, by blasting with shot, focusing light, or in recent years, with water column impacts and cavitation jets. With the notable exception of laser peening, peening is normally a cold work process tending to expand the surface of the cold metal, thus inducing compressive stresses or relieving tensile stresses already present. It can also encourage strain hardening of the surface metal.
References
- ↑ Baughman, D.L. (1970). "Peen Forming". The Shot Peener.
- ↑ Baughman, D.L. (1984), "An Overview of Peen Forming Technology", in Fuchs, H.O. (ed.), Proceedings of the Second International Conference on Shot Peening: ISCP-2, Chicago, Illinois, 14-17 May 1984, Paramus, N.J., pp. 28–33
{{citation}}: CS1 maint: location missing publisher (link) - 1 2 O'Hara, Peter (2003), "Peen Forming - A Developing Technique", in Wagner, Lothar (ed.), Shot Peening, Weinheim: Wiley, pp. 217–226, doi:10.1002/3527606580.fmatter
- ↑ Borger, James C. (1951). "Method of cold forming sheets".
- ↑ Homer, S.E.; Van Luchene, R.D. (June 1991). "Aircraft wing skin contouring by shot peening". Journal of Material Shaping Technology. 9 (2): 89–101. doi:10.1007/BF02833639.
- ↑ Friese, Axel; Lohmar, Jürgen; Wüstefeld, Frank (2003), "Current Applications of Advanced Peen Forming Implementation", in Wagner, Lothar (ed.), Shot Peening, Weinheim: Wiley, pp. 53–61, doi:10.1002/3527606580.fmatter
- ↑ Gapiéry, A.; Miao, H.; Lévesque, M. (2014), "Peen Forming", in Hashmi, Saleem (ed.), Peen Forming, Elsevier, pp. 295–329
 | This metalworking article is a stub. You can help Wikipedia by expanding it. |