Effect of Initial Microstructure on Superplasticity in Ultrafine Grained 18Cr-9Ni Stainless Steel

Tsuchiyama, Toshihiro; Nakamura, Yoshikazu; Hidaka, Hideyuki; Takaki, Setsuo

doi:10.2320/matertrans.45.2259

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…This approach is limited to special series of metastable austenitic steels; thus, there are few studies performed on mechanical characterization of the obtained material. However, there are reports of the treated material exhibiting enhanced microhardness, superplasticity, strength and ductility, , and corrosion resistance …”

Section: Spd Techniquesmentioning

confidence: 99%

Cell Response to Nanocrystallized Metallic Substrates Obtained through Severe Plastic Deformation

Bagherifard

Ghelichi

Khademhosseini

et al. 2014

ACS Appl. Mater. Interfaces

117

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Cell-substrate interface is known to control the cell response and subsequent cell functions. Among the various biophysical signals, grain structure, which indicates the repeating arrangement of atoms in the material, has also proved to play a role of significant importance in mediating the cell activities. Moreover, refining the grain size through severe plastic deformation is known to provide the processed material with novel mechanical properties. The potential application of such advanced materials as biomedical implants has recently been evaluated by investigating the effect of different substrate grain sizes on a wide variety of cell activities. In this review, recent advances in biomedical applications of severe plastic deformation techniques are highlighted with special attention to the effect of the obtained nano/ultra-fine-grain size on cell-substrate interactions. Various severe plastic deformation techniques used for this purpose are discussed presenting a brief description of the mechanism for each process. The results obtained for each treatment on cell morphology, adhesion, proliferation, and differentiation, as well as the in vivo studies, are discussed. Finally, the advantages and challenges regarding the application of these techniques to produce multifunctional bio-implant materials are addressed.

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Section: Spd Techniquesmentioning

confidence: 99%

Cell Response to Nanocrystallized Metallic Substrates Obtained through Severe Plastic Deformation

Bagherifard

Ghelichi

Khademhosseini

et al. 2014

ACS Appl. Mater. Interfaces

117

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“…This suggested that the reverted NG/UFG austenite was stable to avoid excessive grain growth during tensile deformation. In addition, the retained martensite after reversion annealing can also be effective for suppressing grain growth of austenite because of pinning effect [21].…”

Section: Tensile Fracture Characteristicsmentioning

confidence: 99%

“…Katoh et al [20] observed superplastic behavior in Fe-18Cr-9Ni steel at 700°C. Tsuchiyama [21] and Suzaki [22] also obtained superplasticity in similar steel with UFG microstructure. However, the superplasticity was achieved at elevated temperature, which was greater than 0.5 Tm.…”

Section: Introductionmentioning

confidence: 98%

Low temperature superplastic-like deformation and fracture behavior of nano/ultrafine-grained metastable austenitic stainless steel

Sun

et al. 2017

Materials & Design

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We describe here the low temperature superplastic-like deformation in a nano/ultrafine-grained metasable austenitic stainless steel tensile tested at a strain rate of 2.5×10 -4 s -1 and temperature of 600°C (~0.43 of the absolute melting point). The nano/ultrafine-grained structure was obtained via a combination of cold rolling (~93% in reduction), followed by reversion annealing treatments at 650°C for 10 min, 30 min, and 700°C for 2 min, 5 min, respectively, an approach previously adopted by Misra's group (references 11-16). The reversion of martensite to austenite was dominated by diffusional mechanism. The nano/ultrafine-grained steel exhibited superplastic-like behavior with maximum elongation approaching ~153% and strain rate sensitivity of ~0.22. Furthermore, tensile deformation behavior at 20°C and 600°C, and the corresponding fracture characteristics are discussed. Observations of fracture surface indicated that the fracture was characterized by line-up of voids along the striations, when tensile tested at 20°C. Whereas, the fracture surface at 600°C mainly consisted of uniform distribution of dimples. To further study the fracture mechanism during superplastic-like deformation, deformed structures from the longitudinal region close to the tip of the fracture surface were studied. The fracture surface of superplastic-like deformed steel was characterized by interlinkage of cavities.

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Development of Ultra-Fine-Grained Structure in AISI 321 Austenitic Stainless Steel

Tiamiyu

Szpunar

Odeshi

et al. 2017

Metall Mater Trans A

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Effect of Initial Microstructure on Superplasticity in Ultrafine Grained 18Cr-9Ni Stainless Steel

Cited by 11 publications

References 8 publications

Cell Response to Nanocrystallized Metallic Substrates Obtained through Severe Plastic Deformation

Cell Response to Nanocrystallized Metallic Substrates Obtained through Severe Plastic Deformation

Low temperature superplastic-like deformation and fracture behavior of nano/ultrafine-grained metastable austenitic stainless steel

Development of Ultra-Fine-Grained Structure in AISI 321 Austenitic Stainless Steel

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