Microstructure modification and mechanical property improvement of reduced activation ferritic/martensitic steel by severe plastic deformation

Effect of thermomechanical treatment on radiation hardening behavior in T91 ferritic-martensitic steel was evaluated. An applying of severe plastic deformation (SPD) by the “upsetting-extrusion” method and subsequent heat treatment led to a considerable grain refinement, crushing of martensite lamellas, reduction of MX carbides size and their more uniform distribution. Nanoindentation measurements of SPD-modified steel revealed a 1.4-fold increase in the hardness relative to the initial steel. Irradiation response of modified steel was examined after 1.4 MeV Ar+ ion irradiations in the dose range of 10…45 displacements per atom (dpa) at room temperature and 460 °C. Microstructure characterization was performed by means of transmission electron microscopy (TEM). It was found that dislocation loops and nano-sized argon bubbles dominated the damage microstructure after ion irradiation. The effects of SPD-induced transformations as well as nano-bubbles formation are discussed regarding to the hardening phenomenon observed in irradiated steel.

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A two-step dynamic recrystallization induced by LPSO phases and its impact on mechanical property of severe plastic deformation processed Mg97Y2Zn1 alloy

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.02.107 ◽

2017 ◽

Vol 704 ◽

pp. 509-517 ◽

Cited By ~ 72

Author(s):

Huan Liu ◽

Jia Ju ◽

Xiaowei Yang ◽

Jingli Yan ◽

Dan Song ◽

...

Keyword(s):

Mechanical Property ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Dynamic Recrystallization

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Mechanical properties of Fe -10Ni -7Mn martensitic steel subjected to severe plastic deformation via cold rolling and wire drawing

Journal of Physics Conference Series ◽

10.1088/1742-6596/240/1/012117 ◽

2010 ◽

Vol 240 ◽

pp. 012117 ◽

Cited By ~ 1

Author(s):

H Ghasemi-Nanesa ◽

M Nili-Ahmadabadi ◽

H Shirazi

Keyword(s):

Mechanical Properties ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Cold Rolling ◽

Martensitic Steel ◽

Wire Drawing

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Effects of Severe Plastic Deformation: Mechanical Properties and Beyond

Materials Science Forum ◽

10.4028/www.scientific.net/msf.503-504.91 ◽

2006 ◽

Vol 503-504 ◽

pp. 91-98 ◽

Cited By ~ 5

Author(s):

Yuri Estrin

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Case Studies ◽

Mg Alloys ◽

Beneficial Effects ◽

Kinetics Of

In this talk, a range of effects produced by severe plastic deformation will be considered. In addition to the mechanical property improvements, such as enhanced strength and more favourable conditions for superplasticity, SPD will be shown to produce a much broader spectrum of beneficial effects. Case studies demonstrating accelerated kinetics of nitriding of steels and hydrogenation of Mg alloys will be presented. Further possible applications of SPD techniques will be discussed.

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On the Use of Functionally Graded Materials to Differentiate the Effects of Surface Severe Plastic Deformation, Roughness and Chemical Composition on Cell Proliferation

Metals ◽

10.3390/met9121344 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1344 ◽

Cited By ~ 3

Author(s):

Laurent Weiss ◽

Yaël Nessler ◽

Marc Novelli ◽

Pascal Laheurte ◽

Thierry Grosdidier

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Functionally Graded Materials ◽

Early Stage ◽

Research Work ◽

Functionally Graded ◽

Surface Mechanical Attrition Treatment ◽

Major Question ◽

Graded Materials ◽

Microstructure Modification

Additive manufacturing allows the manufacture of parts made of functionally graded materials (FGM) with a chemical gradient. This research work underlines that the use of FGM makes it possible to study mechanical, microstructural or biological characteristics while minimizing the number of required samples. The application of severe plastic deformation (SPD) by surface mechanical attrition treatment (SMAT) on FGM brings new insights on a major question in this field: which is the most important parameter between roughness, chemistry and microstructure modification on biocompatibility? Our study demonstrates that roughness has a large impact on adhesion while microstructure refinement plays a key role during the early stage of proliferation. After several days, chemistry is the main parameter that holds sway in the proliferation stage. With this respect, we also show that niobium has a much better biocompatibility than molybdenum when alloyed with titanium.

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