Factors influencing tensile ductility of ultrafine-grained Mg–3Al–1Zn alloy sheet at elevated temperatures

The processing of bulk metals through the application of severe plastic deformation provides an opportunity for achieving exceptional grain refinement to the submicrometer or even the nanometer range. This paper examines the characteristics of metals processed by equal-channel angular pressing with special emphasis on the levels of ductility that may be attained. It is shown that the amount of ductility is dependent not only upon the composition of the material but also, and to a major extent, upon the testing temperature. Specifically, the ductilities are often low at ambient temperatures where the strength of the as-processed material is relatively high but, by contrast, exceptionally high superplastic ductilities may be achieved over short ranges of strain rate when testing at elevated temperatures.

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Factors Influencing Tensile Ductility of OFHC Cu Having Different Ultrafine Grained Structures

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.m2010089 ◽

2010 ◽

Vol 51 (11) ◽

pp. 2049-2055 ◽

Cited By ~ 8

Author(s):

Lee Ju Park ◽

Hyung Won Kim ◽

Chong Soo Lee ◽

Kyung-Tae Park

Keyword(s):

Tensile Ductility ◽

Factors Influencing ◽

Ultrafine Grained

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Tensile Ductility of Al-Mg Alloy Sheet at Elevated Temperatures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.5.1 ◽

1984 ◽

Vol 5 ◽

pp. 1-18

Author(s):

F.A. Shehata

Keyword(s):

Elevated Temperatures ◽

Tensile Ductility ◽

Alloy Sheet ◽

Mg Alloy

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Fabrication and Estimation of an Ultrafine Grained Complex Aluminum Alloy Sheet by the ARB Process Using Dissimilar Aluminum Alloys

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2011.49.11.893 ◽

2011 ◽

Vol 49 (11) ◽

Keyword(s):

Aluminum Alloy ◽

Aluminum Alloys ◽

Alloy Sheet ◽

Aluminum Alloy Sheet ◽

Complex Aluminum ◽

Dissimilar Aluminum Alloys ◽

Ultrafine Grained

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Study on the Formability of Aluminium Alloy Sheets at Room and Elevated Temperatures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.877.393 ◽

2016 ◽

Vol 877 ◽

pp. 393-399

Author(s):

Jia Zhou ◽

Jun Ping Zhang ◽

Ming Tu Ma

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Elevated Temperature ◽

Aluminium Alloy ◽

Aluminium Alloys ◽

Elevated Temperatures ◽

Hot Stamping ◽

Natural Aging ◽

Alloy Sheet ◽

Aluminum Alloy Sheet

This paper presents the main achievements of a research project aimed at investigating the applicability of the hot stamping technology to non heat treatable aluminium alloys of the 5052 H32 and heat treatable aluminium alloys of the 6016 T4P after six months natural aging. The formability and mechanical properties of 5052 H32 and 6016 T4P aluminum alloy sheets after six months natural aging under different temperature conditions were studied, the processing characteristics and potential of the two aluminium alloy at room and elevated temperature were investigated. The results indicated that the 6016 aluminum alloy sheet exhibit better mechanical properties at room temperature. 5052 H32 aluminum alloy sheet shows better formability at elevated temperature, and it has higher potential to increase formability by raising the temperature.

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Improved Formability and Deep Drawing of Cross-Rolled Magnesium Alloy Sheets at Elevated Temperatures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.488-489.461 ◽

2005 ◽

Vol 488-489 ◽

pp. 461-464 ◽

Cited By ~ 1

Author(s):

Yong Chao Xu ◽

Shi Hong Zhang ◽

H.M. Liu ◽

Z.T. Wang ◽

W.T. Zheng ◽

...

Keyword(s):

Magnesium Alloy ◽

Deep Drawing ◽

Elevated Temperatures ◽

Rolling Direction ◽

Alloy Sheet ◽

Rolled Sheet ◽

Drawing Ratio ◽

Cross Rolling ◽

Magnesium Alloy Sheet ◽

Cylindrical Cup

The extruded sheets were prepared at the temperature between 350ıand 400ı, and the magnesium alloy sheet was manufactured by a new method, cross rolling, in which the rolling direction was changed in each pass. At the time, deep drawing of magnesium alloy sheet was investigated at elevated temperatures. The results show that the sheet has refined-grain by cross-rolling after it was annealed at 250ı, and the formability is significantly improved at lower temperatures, which is superior to the extruded sheet and the one-way rolled sheet. Deep drawing of magnesium alloy was performed successfully, and cylindrical cup of limited drawing ratio (LDR) 2.6 and 35 mm deep rectangular box (65ı50) was achieved at the lower temperature of 170ı. The different types of fracture were analyzed and reasonable parameters were determined.

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Determining the material model at elevated temperatures with different strain rates and simulating the warm forming process for Mg alloy AZ31B sheet

Science and Technology Development Journal ◽

10.32508/stdj.v18i2.1087 ◽

2015 ◽

Vol 18 (2) ◽

pp. 149-158

Author(s):

Thien Tich Truong ◽

Long Thanh Nguyen ◽

Binh Nguyen Thanh Vu ◽

Hien Thai Nguyen

Keyword(s):

Magnesium Alloy ◽

Constitutive Equations ◽

Elevated Temperatures ◽

Material Model ◽

Alloy Sheet ◽

Strain Rates ◽

Functional Requirements ◽

Temperature Dependent ◽

Forming Process ◽

Az31b Alloy

Magnesium alloy is one of lightweight alloys has been studied more extensively today. Because weight reduction while maintaining functional requirements is one of the major goals in industries in order to save materials, energy and costs, etc. Its density is about 2/3 of aluminum and 1/4 of steel.The material used in this study is commercial AZ31B magnesium alloy sheet which includes 3% Al and 1% Zn. However, due to HCP (Hexagonal Close Packed) crystal structure, magnesium alloy has limited ductility and poor formability at room temperature. But its ductility and formability will be improved clearly at elevated temperature. From the data of tensile testing, the constitutive equations of AZ31B was approximated using the Ramgberg-Osgood model with temperature dependent parameters to fit in the experiment results in tensile test. Yield locus are also drawn in plane stress σ1- σ2 with different yield criteria such as Hill48, Drucker Prager, Logan Hosford, Y. W. Yoon 2013 and particular Barlat 2000 criteria with temperature dependent parameters. Applying these constitutive equations were determined at various temperatures and different strain rates, the finite element simulation stamping process for AZ31B alloy sheet by software PAM- STAMP 2G 2012, to verify the model materials and the constitutive equations.

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Tensile Deformation and Fracture in a Bulk Nanostructured Al-5083/SiCp Composite at Elevated Temperatures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.29-30.245 ◽

2007 ◽

Vol 29-30 ◽

pp. 245-248

Author(s):

F. Tang ◽

B.Q. Han ◽

Masuo Hagiwara ◽

Julie M. Schoenung

Keyword(s):

Elevated Temperatures ◽

Tensile Deformation ◽

Tensile Tests ◽

Nanostructured Composite ◽

Sic Particles ◽

Deformation And Fracture ◽

Ultrafine Grained ◽

Al 5083 Alloy

An ultrafine-grained Al-5083 alloy reinforced with 5 vol.% nano-sized β-SiC particles was fabricated with a powder cryomilling and consolidation technique. Tensile tests were conducted at temperatures from 298 to 773 K for this composite. The mechanisms for deformation and fracture of this nanostructured composite at various temperatures are discussed.

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