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عنوان فارسی مقاله:
مطالعه ارسال غلتک تغییر شکل شدید پلاستیک آلیاژ سیلیکون آلومینیوم منگنز
عنوان انگلیسی مقاله:
Study on the post-rolling direction of severely plastic deformed Aluminum-Manganese-Silicon alloy
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Ultra-fine grained (UFG) materials have got significant attraction in recent years since they have had unique combination of physical and mechanical properties compared to those of coarse-grained [1]. Approaching to nanostructure have remarkable effect on mechanical strength enhancement; especially in the case of light metals such as aluminum alloys whereby the grain refinement lead to ennoblement of the strength to weight ratio and makes them susceptible more than ever to be employed in transportation and aerospace industries [2]. For this purpose, different SPD methods such as, equal channel angular pressing (ECAP) [3], high pressure torsion (HPT) [4], accumulative back extrusion (ABE) [5], tubular channel angular pressing (TCAP) [6], accumulative roll bonding (ARB) [7], repetitive corrugation and straightening (RCS) [8], multi directional forging (MDF) [9] have been investigated broadly in the recent years. However, some of the mentioned techniques practically ineffectual for the manufacturing of plate-shaped products. ARB and CGP are two versatile SPD techniques for consolidation of metallic sheets. CGP induces the repetitive shear deformation under plane-strain condition utilizing the successive pressings with asymmetric grooved and flattened dies [10]. More details on CGP could be found in literature [10,11]. Cold rolling is known as one of the most advantageous metal working processes for continuous production of bulky materials having shapes such as plate, sheet and bar. Literature claims suggest that the rolled structures usually have lamellar structure with low-angle grain boundaries while the ultra-fine grained structures owing to severe straining are often granular-type containing mainly high-angle grain boundaries [12]. Also, more recent works [13–15] highlighted that further rolling of severely deformed samples spread the high-angle boundaries within the structure resulted in uniform ultra-fine grained material achievement. Hansen et al. [16–18] provided a thorough study on the cold-rolling effects on mechanical and microstructural characteristics of commercial pure aluminum up to the large strains. Likewise, the influence of post-rolling on the nature and behavior of SPDed materials have been studied scarcely. Attention has been focused on steels, copper, aluminum, magnesium, titanium and their alloys [15,19–22]. It was ascertained that exertion of subsequent rolling on SPDed matter could accelerate the grain refinement and improve the material strength. Beside, often it has been reported that this enhancement was attended by drop in ductility [21]. Of course, carry on rolling to the elevated strains exclusively might break the material's resistance due to micro-cracks propagation since their formation is elucidated to be inevitable in such large deformations. This threat is contingent when the archetypal has a thickness within low range scales. Despite of the investigation into the cold-rolling influence on some SPDed alloys, regardless of the type of alloy and the utilized method, no render has been reported previously about the lattice transformation while rolling as the terminal processing of CGPed materials. Briefly explained reasons beside profuse unanswered questions about the rollingdirection effects on microstructural and mechanical characteristics of already strained aluminum alloys by CGP method was motivated the authors to inquire the correlation of lattice parameters and achieved material properties for Al-Mn-Si alloy in hypothesized deformation paths.
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کلمات کلیدی:
Aluminum Alloys: Structure and Properties https://books.google.com/books?isbn=1483144828 L. F. Mondolfo - 2013 - Technology & Engineering Wrought alloys with 5-6% Cu and often small amounts of manganese, silicon, ... Plastic deformation, too, breaks up the brittle network and distributes the ... 3000 series aluminum wrought alloys - Altek-MHD ltd www.altek-mhd.com/en/articles/overview3k This series of alloys hardened only by cold plastic deformation. ... Impurities of iron and silicon reduce the solubility of manganese in aluminum, iron in the alloy ... Translation Title List and Cross Reference Guide https://books.google.com/books?id=ip0sLnmPlBQC 1961 - Nuclear energy Copper (Cont'd) plastic deformation, dependence on speed and temperature of ... (See Aluminum-copper alloys) Copper-aluminum-magnesium-manganese alloys ... NSF-tr-141 Copper-iron-magnesium-silicon systems burns from tempering ... Searches related to plastic deformed Aluminum-Manganese-Silicon alloy aluminum silicon alloy properties aluminum silicon alloy phase diagram aluminium silicon alloy microstructure al-si alloy microstructure why is silicon added to aluminum casting alloys aluminium silicon alloy composition al-si alloy application al-si alloys mechanical properties
