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1

In situ investigations of microstructural changes during tensile deformation of AISI 304L stainless steels

Singh Navjot, Nanda Tarun, Kumar B. Ravi, Das Swapan Kumar, Singh Vishal

Archives of Civil and Mechanical Engineering

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2019

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Vol. 19, no. 3

672--679

EN

The present work investigates the microstructural changes in an AISI 304L austenitic stainless steel during the early stages of tensile deformation (where austenite does not transform to strain induced martensite). In situ tensile experiments were conducted to record grain orientation changes and slip activation in the steel. The effect of grain size, neighboring grains, and annealing twins on orientation changes during deformation was investigated. Results showed that at a given strain level, grains lying in relatively softer regions and possessing higher Schmid factor values accommodated the plastic deformation initially and showed orientation changes toward the stable orientation. The relatively larger grains changed their orientations only at higher strain levels. Grain orientation changes were also influenced by size and crystallographic orientation of neighboring grains. For grains containing annealing twins, the orientation changes of twin and its grain were in different directions during deformation at a given strain level. Further, grains containing multiple twins showed delayed deformation. The study of tensile deformation behavior in this respect opens up new routes to alter and hence enhance the mechanical properties of materials by engineering their microstructure.

2

Evolution of grain orientation in Al-Li alloy deformed by plane strain compression

Mizera J.

Archiwum Nauki o Materiałach

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2002

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T. 23, nr 2

101-121

EN

Plane strain compression tests on Al-Li alloy have shown that grains undergo a significant deformation shear. This deformation favours the formation of the Bs(011)<211> texture component. The grain orientations change in accordance with the RC2(epsilon 12) and RC(epsilon 13) models.

PL

Badania procesu odkształcenia stopu Al-Li w płaskim stanie odkształceń wykazały, że ziarna są poddane znacznemu ścinaniu. Ścinanie to ułatwia powstawanie składowej tekstury typu Bs (001)<211>. Orientacje ziaren zmieniają się zgodnie z przewidywaniami modeli opisanych w literaturze pod nazwą RC2(epsilon 12) i RC2(epsilon 13).

3

Microstructure evolution during strain path changes in an aluminium alloy.

Lewandowska M., Świątnicki W.

Inżynieria Materiałowa

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2001

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R. XXII, nr 4

544-547

EN

In this work the microstructure evolution during strain path changes in the 5182-aluminium alloy was examined using transmission electron microscopy (TEM). This evolution was correlated with the mechanical behaviour of the material. It was found that the microstructure formed during straining depends on the grain orientation but also on the deformation path that the grain undergoes during straining.

PL

W pracy badano ewolucję mikrostruktury podczas zmiany drogi odkształcenia w stopie aluminium 5182. Ewolucję tą skorelowano z zachowaniem mechanicznym materiału. Stwierdzono ponadto, że tworząca się mikrostruktura zależy od orientacji ziarna oraz drogi, jaką dane ziarno dochodzi do końcowej orientacji podczas odkształcenia plastycznego.