دانلود رایگان مقاله لاتین آلیاژ آلومینیوم آکوستیک از سایت الزویر
عنوان فارسی مقاله:
پتانسیل های نظارت درجا فورج آلیاژ آلومینیوم توسط انتشار آکوستیک
عنوان انگلیسی مقاله:
Potentials of in situ monitoring of aluminum alloy forging by acoustic emission
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Forged components are characterized by high mechanical strength under static as well as dynamic loads. These properties can be attributed mainly to a process-related reduced grain size, thewell-distributedmicrostructureandtheir structuralintegrity comparedtocastparts.Withrespecttoenergyand environment considerations lightweight material alloys are continuously gaining importance. Most processed metallic construction materials for lightweight applications are based on aluminum and there is anincreasing trendof substituting bulk formed steel products with non-ferrous metal parts [1]. Aluminum alloys are characterized by a low density accompanied by a high mechanical strength compared to Fe-based alloys. Cold [2], warm [3] and hot forging [4] are possible with their respective advantages and disadvantages. In order to reduce long production times due to heat treatment and enhance shape accuracy, lower practicable forging temperatures are preferred in some cases. Here, the formability is reduced and the workpiece can react sensitively to changing process conditions resulting in a higher cracking risk. Generally, an early detection of failures is aimed atin production. In fast and automated forging processes cracks cannot always be recognized immediately.
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کلمات کلیدی:
Acoustic Emission (AE) Monitoring of Open Die and Closed Die ... www.tandfonline.com/doi/full/10.1080/10426910701448974?scroll=top...true Sep 15, 2010 - Keywords: Acoustic emission (AE), Al Alloy, Closed die forging, Die filling, ... The use of force/displacement signals to monitor metal forming ... Optimization of Positioning of an Acoustic Emission Sensor for ... www.tandfonline.com › List of Issues › Table Of Contents by CK Mukhopadhyay - 2006 - Cited by 2 - Related articles Feb 7, 2007 - Acoustic emission signals generated during forging operations on an aluminium alloy were recorded using three sensors simultaneously by ... Acoustic emission in the failure of materials - Springer link.springer.com/content/pdf/10.1007%2FBF00722121.pdf acoustic emission signals caused by friction of the crack edges are .... fracture toughness coefficients (Kic) of VALIO and AL9 aluminum casting alloys and, for com- ... 230 x 230 mm cross section forging forged from a 250-mm-diam. bar,. Light Alloys: Directory and Databook - Page 356 - Google Books Result https://books.google.com/books?isbn=1461557771 Robert John Hussey, Josephine Wilson - 2013 - Technology & Engineering E1801-96 : Adhesive Bonding of Aluminum Facings in Foam & Beam Type Shelters ... Aluminum Alloys for Spectrochemical Analysis E749-96 : Acoustic Emission ... drawn, Cold-finished, & centerless ground wire, rod, bar & forging stock 2202 ... [PDF]Online Monitoring of Hot Die Forging Processes Using Acoustic ... www.ndt.net/article/jae/papers/26-208.pdf by I EL-GALY - Cited by 8 - Related articles Keywords: Hot die forging, online monitoring, forging defects, Mg-alloys. Abstract. Online process ... Acoustic Emission in Metal Forming Applications. During the ... Acoustic Emission - Page 69 - Google Books Result https://books.google.com/books?isbn=0677164904 James R. Matthews - 1983 - Technology & Engineering that the acoustic emission behavior of a material can be substantially ... Aluminum in the T651 condition has been subjected to a stress relief stretching operation ... aged condition,1 but essentially no emission in the forged and aged condition.
