Physical and mechanical properties of iron-aluminium-(Mn, Si) lightweight steels

Frommeyer, G.; Drewes, E.-J.; Engl, Bernhard

doi:10.1051/metal:2000110

Cited by 147 publications

(104 citation statements)

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“…It is also evident that the total elongation and ductility of the samples is reduced after each ECAP pass, although the values can be considered high, especially in terms of the reduction of area. In general, the elongation values are similar or larger than the ones reported for some conventional deep drawing steels, such as FeP04, Z St E 180 BH, high strength IF (HS) and Q St E 500 TM [28].…”

Section: Mechanical Propertiesmentioning

confidence: 81%

Equal channel angular pressing of a TWIP steel: microstructure and mechanical response

et al. 2017

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A Fe-20.1Mn-1.23Si-1.72Al-0.5C TWIP steel with ultra-fine grain structure was successfully processed through Equal Channel Angular Pressing (ECAP) at warm temperature up to four passes following the BC route. The microstructure evolution was characterized by Electron Back Scattered Diffraction (EBSD) to obtain the grain maps, which revealed an obvious reduction of grain size, as well as a decrease of the twin fraction, with increasing number of ECAP passes. The texture evolution during ECAP was analyzed by Orientation Distribution Function (ODF). The results show that the annealed material presents Brass (B) as dominant component. After ECAP, the one pass sample presents A1 * and A2 * as the strongest components, while the two passes and four passes samples change gradually towardcomponents. TEM analysis shows that all samples present twins. The twin thickness is reduced with increasing the number of ECAP passes. Nano-twins, as a result of secondary twinning, are also observed in the one and two passes samples. In the four passes sample the microstructure is extensively refined by the joint action of ultra-fine subgrains, grains and twins. The mechanical behavior was studied by tensile samples and it was found that the yield strength and the ultimate tensile strength are significantly enhanced at increasing number of ECAP passes. Although the ductility and strain hardening capability are reduced with ECAP process, the present TWIP steel shows significant uniform deformation periods with positive work-hardening rates.

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Section: Mechanical Propertiesmentioning

confidence: 81%

Equal channel angular pressing of a TWIP steel: microstructure and mechanical response

et al. 2017

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“…Although Al can be added in low-density ferritic steels up to fairly high amount of 11 wt.%, 14 it has been suggested that the Al content should be restricted to less than 6.5 wt.%. 18 Short-range ordering, which increases brittleness and therefore is detrimental to formability, can take place with higher Al content (>6.5 wt.%) within the ferritic range.…”

Section: Steels According To Phase Constitutionmentioning

confidence: 99%

“…18,20,21 However, these alloys are simpler to process and exhibit mechanical properties suitable for automotive outer panel applications. The ferritic low-density steels contain essentially Al, which being a ferrite stabilizer, reduces the austenitic loop significantly while expanding the ferritic phase field.…”

Section: Steels According To Phase Constitutionmentioning

confidence: 99%

“…2, where the reductions in density of Fe-Al and Fe-Mn-Al-C alloys are shown as a function of Al content. 18,19 Approximately 8 wt.% of Al causes density reduction of $10%. Manganese, which is often added in multiphase low-density steels, also reduces slightly the density of steels.…”

Section: Bulk Iron Alloysmentioning

confidence: 99%

“…The pure high Al-containing ferritic steels can be interstitial free (IF) 20 and bake hardenable; 28 some of the low-density steels containing austenite are precipitation hardenable (by j-carbides). 21,[29][30][31] Others could involve transformation-induced plasticity (TRIP; including d-TRIP), [32][33][34] twinning-induced plasticity (TWIP), 18,22,35,36 shear band induced plasticity (SIP), 19 or micro band induced plasticity (MBIP), 37,38 depending on the alloy composition and processing parameters. Furthermore, the duplex steels can sometimes contain certain amounts of F m3m -type D0 3 or CsCl-type B2 phase formed due to decomposition of L'12 j-carbides during an ordering heat treatment.…”

Section: Classification Of Bulk Iron Alloysmentioning

confidence: 99%

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Overview of Lightweight Ferrous Materials: Strategies and Promises

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2014

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Reducing the density of steels is a novel approach for weight reduction of automobiles to improve fuel efficiency. In this overview article, strategies for the development of lightweight steels are presented with a focus on bulk ferrous alloys. The metallurgical principles of these steels and their mechanical properties of relevance to automotive applications are discussed. Some of the engineering aspects highlighting the possible problems related to mass production of these steels are also considered. Application prospects of these steels vis-à -vis standard automotive steels are shown.

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Effect of Soluble Al Content on the Microstructure and Property of Batch Annealed Ti-If Steels

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Jie²,

Bin³

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Physical and mechanical properties of iron-aluminium-(Mn, Si) lightweight steels

Cited by 147 publications

References 1 publication

Equal channel angular pressing of a TWIP steel: microstructure and mechanical response

Equal channel angular pressing of a TWIP steel: microstructure and mechanical response

Overview of Lightweight Ferrous Materials: Strategies and Promises

Effect of Soluble Al Content on the Microstructure and Property of Batch Annealed Ti-If Steels

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