Effect of reverse and cyclic shear on the work-hardening of AISI 430 stainless steel |
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Authors: | Wellington Lopes Elaine Carballo Siqueira Corrêa Haroldo Béria Campos Maria Teresa Paulino Aguilar Paulo Roberto Cetlin |
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Affiliation: | 1.Department of Metallurgical and Materials Engineering,Federal University of Minas Gerais,Belo Horizonte,Brazil;2.Federal Center of Technological Education of Minas Gerais, CEFET/MG,Belo Horizonte,Brazil;3.Department of Mechanical Engineering,Federal University of Minas Gerais,Belo Horizonte,Brazil;4.Department of Materials and Construction Engineering,Federal University of Minas Gerais,Belo Horizonte,Brazil |
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Abstract: | Sheet metal forming commonly involves various processing steps leading to complex strain paths. The work hardening of the
metal under these circumstances is different from that observed for monotonic straining. The effect of the strain path on
the hardening of materials is usually studied through sequences of standard mechanical tests, and the shear test is especially
well adapted to such studies in sheet forming. Shear straining covering Bauschinger and cyclic strain paths were used in the
analysis of the hardening of AISI 430 stainless steel sheets. The tests were conducted at 0°RD, 45°RD, and 90°RD (Rolling
Direction) and for three effective strain amplitudes. The results indicate that the material presents Bauschinger effects
and strain hardening transients that are sensitive to the testing direction. In addition, the cyclic straining leads to an
oscillating stress pattern for the forward and reverse shearing cycles, which depends on the deformation amplitude. |
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