The Recrystallization Behavior in Ultrafine-Grained Structure Steel Fabricated by Cold Rolling and Annealing

2017 ◽  
Vol 42 (11) ◽  
pp. 4771-4777 ◽  
Author(s):  
Qing Yuan ◽  
Guang Xu ◽  
Jun-yu Tian ◽  
Wei-cheng Liang
Keyword(s):  
Cold Rolling ◽  
Recrystallization Behavior ◽  
Ultrafine Grained Structure ◽  
Ultrafine Grained ◽  
Cold Rolling And Annealing

Role of Heavy Deformation in Thermomechanical Processing on the Formation of Ultrafine-Grained Structure in Steels

2007 ◽  
Vol 558-559 ◽  
pp. 23-31 ◽  
Author(s):  
Tadashi Maki
Keyword(s):  
Cold Rolling ◽  
Thermomechanical Processing ◽  
High Carbon Steel ◽  
Point Of View ◽  
Matrix Phase ◽  
Second Phase ◽  
Two Phase ◽  
Ultrafine Grained Structure ◽  
Ultrafine Grained ◽  
Microduplex Structure

The formation of ultrafine-grained structure in steels by various thermomechanical processings is reviewed from a metallurgical point of view. In the recent new type TMCP, ultrafine ferrite grains with a grain size of about 1μm are obtained when the austenite is heavily deformed at lower temperatures. In this case, dynamic phenomena such as dynamic recrystallization become prominent in the process. In the aging after heavy cold rolling of supersaturated matrix phase in two-phase alloys, the competition between the recovery or recrystallization of matrix phase and the precipitation of second phase occurs, resulting in various types of two-phase structures including microduplex structure. Microduplex structure is also obtained by annealing after heavy cold rolling of coarse two-phase structure in duplex stainless steel and high carbon steel. Recently, various severe plastic deformation processings, in which very large plastic strain over 4 is applied to the materials, have been developed to produce ultrafine grained materials with nanocrystalline and/or submicrocrystalline structures.

Development of Fine-Grained High-Mn Steelby Cold Rolling and Annealing

2016 ◽  
Vol 838-839 ◽  
pp. 434-439 ◽  
Author(s):  
Zhanna Yanushkevich ◽  
Andrey Belyakov ◽  
Rustam Kaibyshev ◽  
Christian Haase ◽  
Dmitri A. Molodov
Keyword(s):  
Cold Rolling ◽  
Shear Banding ◽  
Mechanical Twinning ◽  
Rolling Reduction ◽  
Fine Grained ◽  
Noticeable Increase ◽  
Ultrafine Grained ◽  
Cold Rolling And Annealing ◽  
Ultrafine Grained Microstructure ◽  
Ultrafine Grained Steel

The regularities of static recrystallization in an Fe-0.3C-17Mn-1.5Al TWIP steel subjected to cold rolling and annealing were studied. The cold rolling led to noticeable increase in the dislocation density, extensive mechanical twinning and shear banding. The subsequent annealing resulted in the development of recovered or recrystallized microstructure depending on the rolling reduction and the annealing temperature. An increase in the rolling reduction promoted the recrystallization development, which led to ultrafine-grained microstructure with a grain size below 10 μm. The developed ultrafine-grained steel samples are characterized by beneficial mechanical properties.

scholarly journals Effect of cross cold rolling and annealing on microstructure and texture in pure nickel

2020 ◽  
Vol 59 (1) ◽  
pp. 252-263
Author(s):  
Lixia Wang ◽  
Xingpin Chen ◽  
Tianhong Luo ◽  
Haitao Ni ◽  
Lin Mei ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Cube Texture ◽  
Deformation Texture ◽  
Pure Nickel ◽  
Recrystallization Behavior ◽  
Oriented Growth ◽  
Cold Rolling And Annealing ◽  
Deformation Textures ◽  
Annealing Experiments

AbstractThe microstructure and texture in pure nickel were investigated during multi-step cross cold rolling (CCR) and subsequent annealing. It was found that the deformation texture in the CCR nickel was dominated by Brass and rotated Brass about normal direction (ND) (BsND) texture components, along with marginal cube textures. The resulted deformation textures had a significant effect on the recrystallization behavior. Annealing of the CCR nickel at 550°C for 1 h led to the formation of dominant <012> // ND fiber accompanied by minor rotated cube textures, rather than strong cube texture. Increasing the annealing temperature up to 800°C resulted in further enhancement of <012> // ND fiber textures. The possible reasons for recrystallization behavior in annealed CCR sample were discussed based on in-situ annealing experiments from two aspects of oriented nucleation and oriented growth theories.

scholarly journals Microstructural Investigation of a Friction-Welded 316L Stainless Steel with Ultrafine-Grained Structure Obtained by Hydrostatic Extrusion

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1537
Author(s):  
Beata Skowrońska ◽  
Tomasz Chmielewski ◽  
Mariusz Kulczyk ◽  
Jacek Skiba ◽  
Sylwia Przybysz
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Friction Welding ◽  
High Speed ◽  
316L Stainless Steel ◽  
Welded Joint ◽  
Microstructural Investigation ◽  
Ultrafine Grained Structure ◽  
Ultrafine Grained ◽  
Friction Joint

The paper presents the microstructural investigation of a friction-welded joint made of 316L stainless steel with an ultrafine-grained structure obtained by hydrostatic extrusion (HE). Such a plastically deformed material is characterized by a metastable state of energy equilibrium, increasing, among others, its sensitivity to high temperatures. This feature makes it difficult to weld ultra-fine-grained metals without losing their high mechanical properties. The use of high-speed friction welding and a friction time of <1 s reduced the scale of the weakening of the friction joint in relation to result obtained in conventional rotary friction welding. The study of changes in the microstructure of individual zones of the friction joint was carried out on an optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and electron backscattered diffraction (EBSD) analysis system. The correlation between the microstructure and hardness of the friction joint is also presented. The heat released during the high-speed friction welding initiated the process of dynamic recrystallization (DRX) of single grains in the heat-affected zone (HAZ). The additional occurrence of strong plastic deformations (in HAZ) during flash formation and internal friction (in the friction weld and high-temperature HAZ) contributed to the formation of a highly deformed microstructure with numerous sub-grains. The zones with a microstructure other than the base material were characterized by lower hardness. Due to the complexity of the microstructure and its multifactorial impact on the properties of the friction-welded joint, strength should be the criterion for assessing the properties of the joint.

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