Effect of alloying composition on low-cycle fatigue properties and microstructure of Fe–30Mn–(6−x)Si–xAl TRIP/TWIP alloys

Nikulin, Ilya; Sawaguchi, Takahiro; Tsuzaki, Kaneaki

doi:10.1016/j.msea.2013.08.061

Cited by 110 publications

(64 citation statements)

References 32 publications

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“…2, i.e., (a) extended dislocation glide, (b) mechanical £-twinning, and (c) £ ¼ ¾ martensitic transformation, may be commonly durable to cyclic deformation, because all of these involve the Shockley partial-stacking fault unit as a microstructure component that can make the back-and-forth movement under cyclic loading without cross-slip, as the ¾-martensite does. To confirm this assumption, we investigated low-cycle fatigue properties of various high-Mn steels and found empirical laws to improve the low-cycle fatigue lives of the FeMnSi-based alloys: 5,6) i) balancing phase stability between the £-and ¾-phases, ii) suppressing the induction of ¡A-phase under loading, iii) adding Si of approximately 4 mass%.…”

Section: Pilot Tunnelmentioning

confidence: 99%

“…5,6) Based on the fining, the present authors' industry-academic-government joint research group developed a new FeMnSi-based alloy with outstanding low-cycle fatigue lives, and succeeded in applying the alloy as architectural seismic damping components in a skyscraper. 6) A remarkable characteristic of the new seismic damper is its extraordinary durability to accumulated damages caused by long-period and prolonged ground motion and frequent afterquakes.…”

Section: Introductionmentioning

confidence: 99%

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Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

et al. 2016

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FeMnSi-based alloys exhibit a shape-memory effect associated with deformation-induced £ ¼ ¾ martensitic transformation and its reversion. The £ ¼ ¾ martensitic transformation also enhances mechanical properties, such as strength, hardness, wear-resistance and low-cycle fatigue lives of the alloys. In this article, we review fundamental researches on transformation behavior, microstructural and crystallographic characteristics, and functional and mechanical properties of the FeMnSi-based alloys, and introduce various examples of their practical applications. A special emphasis is placed on their new application as architectural seismic dampers, which were developed based on a new finding of the passive two-way martensitic transformations under cyclic tensile-compressive loading.

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Section: Pilot Tunnelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

et al. 2016

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“…Furthermore, the tendency of an austenitic steel to form ε-martensite or twinning depends on the alloy chemistry. In high Mn steels, for instance, alloying with Si increases the likelihood of ε-martensite formation at the expense of deformation twinning [18]. Table 1 summarizes the types of deformation-induced microstructural changes (twinning and ε-martensite) in modifications of FeCrMnNi-based austenitic stainless steels.…”

Section: Relationship Between the Stacking Fault Energy (Sfe) And Defmentioning

confidence: 99%

Considerations in the Design of Formable Austenitic Stainless Steels Based on Deformation-Induced Processes

Mola

2017

Austenitic Stainless Steels - New Aspects

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The temperature dependence of tensile elongation in austenitic steels is discussed in view of the relationship between the stacking fault energy and deformation-induced processes. It is shown that the maximum tensile elongation is achieved in the vicinity of M d γ → α′ temperature. The influence of alloying elements on the temperature dependence of tensile elongation can therefore be analyzed with regard to their influence on the M d γ → α′ temperature. In this regard, majority of alloying elements including C and N decrease the temperature associated with highest tensile elongation. Due to the high efficiency of C and N in increasing the stability of austenite, approaches toward the development of high-interstitial austenitic stainless steels containing minimal amounts of substitutional alloying elements are discussed. Finally, some of the challenges associated with the processing of high-interstitial austenitic stainless steels are reviewed.

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“…6(e) and (g), respectively. A ber texture nearly oriented to [10][11][12]//LD is developed both in temperature ranges I and II. Because the uniaxial tensile deformation induces the ε-martensite variant with the highest Schimd factor and the de ned crystallographic orientation relationship between the γ-and ε-phases, which is known as Shoji-Nishiyama orientation relationship, the basal plane of the deformation-induced ε-martensite is inclined from the deformation axis.…”

Section: Fatigue Microstructurementioning

confidence: 99%

Effect of Deformation Temperature on Low-Cycle Fatigue Properties of Fe-28Mn-6Si-5Cr Shape Memory Alloy

Tasaki

Sawaguchi²,

Nikulin³

et al. 2016

Mater. Trans.

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Effect of deformation temperature on low-cycle fatigue properties of an Fe-28Mn-6Si-5Cr shape memory alloy was investigated. Cyclic push-pull loadings at a total strain range of 0.02 were applied to the alloy at various deformation temperatures ranging from 223 to 523 K. The microstructures and fracture surfaces in the fatigue tested samples were analyzed by means of X-ray diffraction, scanning electron microscopy and electron backscattering diffraction. The highest fatigue life of 22,400 cycles was obtained at 423 K. Increasing or decreasing the deformation temperature resulted in a decrease in fatigue life to several thousand cycles. The specimens deformed to fatigue fracture at temperatures below 298 K exhibited microstructures with ε-martensite and brittle characteristics of the fracture surface, while the specimens deformed above 473 K exhibited the single γ-phase and ductile characteristics of the fracture surface. The deformation at 423 K resulted in a moderate amount of the ε-martensite and a mixed brittle/ductile fracture surface patterns. It is suggested that the highest fatigue life can be obtained when the fatigue temperature lies between M s σ and M d .

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Effect of alloying composition on low-cycle fatigue properties and microstructure of Fe–30Mn–(6−x)Si–xAl TRIP/TWIP alloys

Cited by 110 publications

References 32 publications

Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

Considerations in the Design of Formable Austenitic Stainless Steels Based on Deformation-Induced Processes

Effect of Deformation Temperature on Low-Cycle Fatigue Properties of Fe-28Mn-6Si-5Cr Shape Memory Alloy

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Effect of alloying composition on low-cycle fatigue properties and microstructure of Fe–30Mn–(6−x)Si–xAl TRIP/TWIP alloys

Cited by 110 publications

References 32 publications

Design Concept and Applications of Fe&ndash;Mn&ndash;Si-Based Alloys&mdash;from Shape-Memory to Seismic Response Control

Design Concept and Applications of Fe&ndash;Mn&ndash;Si-Based Alloys&mdash;from Shape-Memory to Seismic Response Control

Considerations in the Design of Formable Austenitic Stainless Steels Based on Deformation-Induced Processes

Effect of Deformation Temperature on Low-Cycle Fatigue Properties of Fe-28Mn-6Si-5Cr Shape Memory Alloy

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Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control