Development of Room Temperature Formability of Rolled Magnesium Alloy Sheets by Texture Control

Chino, Yasumasa; Huang, Xinsheng; Suzuki, Ken

doi:10.2320/jinstmet.j2016059

Cited by 18 publications

(6 citation statements)

References 34 publications

(10 reference statements)

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“…Such inverse relationship between formability and strength is also applicable to other non-REE containing Mg alloys 3 . Figure 1 shows the Index Erichsen (IE) value (which is an indication of stretch formability; see Methods) as a function of yield strength of various Mg alloys 3 , 8 , 12 – 16 . As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Designing a magnesium alloy with high strength and high formability

et al. 2018

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Although magnesium alloys, as the lightest structural alloys, offer significant potential for automotive applications, their applications remain limited due to their poor formability at room temperature. Since the strategies used for improving formability usually result in a degradation of strength, there are no high strength magnesium alloys showing good formability. Here we report an alloy design concept that can simultaneously provide high strength and good formability. Such designed alloy when subjected to an appropriate processing technique shows a combination of strength and formability that surpasses those of the existing magnesium alloys reported so far. The alloy design concept used in the present study is based on the utilization of alloying elements that can induce precipitation, as well as maximize the segregation of other texture-controlling alloying elements. Such developed alloy is expected to broaden the application of Mg alloy sheets, which are now starting to gain acceptance by automotive industries.

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Section: Introductionmentioning

confidence: 99%

Designing a magnesium alloy with high strength and high formability

et al. 2018

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“…Figure 7(c,d), respectively, summary the engineering www.nature.com/scientificreports www.nature.com/scientificreports/ stress as a function of I.E. values as well as engineering strain for various Mg 8,11,12,14,[30][31][32][33][34] and Al 35,36 sheet alloys. As can been seen, the ZAXME11100 sheet alloy shows good stretch formability in T4 condition, which is close to that reported for 6000 series Al alloy 35,36 .…”

Section: Resultsmentioning

confidence: 99%

A new magnesium sheet alloy with high tensile properties and room-temperature formability

Shi

Miao

Avey

et al. 2020

Sci Rep

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Lightweight sheet alloys with superior mechanical performance such as high strength, ductility and formability at room temperature (Rt) are desirable for high volume automotive applications. However, ductility or formability of metallic alloys at Rt are generally inversely related to strength, thereby making it difficult to optimize all three simultaneously. Here we design a new magnesium sheet alloy-ZAXME11100 (Mg-1.0Zn-1.0Al-0.5Ca-0.4Mn-0.2Ce, wt. pct.) via CALPHAD (CALculation of PHAse Diagram) modeling and experimental validation. This new sheet alloy offers an excellent RT formability with a high Index Erichsen (I.E.) value of 7.8 mm in a solution-treated condition (T4), due to its weak and split basal texture and fine grain structure. The new ZAXME 11100 alloy also shows a rapid agehardening response during post-forming artificial aging treatment at 210 °C for 1 hour (T6), resulting in a significant increase of yield strength from 159 MPa (T4) to 270 MPa (T6). The excellent combination of T4 ductility (31%), T4 formability (7.8 mm) and T6 yield strength (270 MPa) in this new magnesium alloy is comparable to that of common 6xxx series aluminum sheet alloys. Thus, this new magnesium sheet alloy is highly attractive for sheet applications in automotive and other industries.

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“…マグネシウム (Mg) 合金は実用金属中で最も低密度で比強度・比剛性に優れるため，軽量構造材料としての活用が期待されている 1,2) ．Mg 合金は最密六方晶の理論的な c 軸 a 軸比 (c/a = 1.633) に近い c/a を有しているため，圧延によって c 軸が板厚 (ND) 方向と平行に配向した(0002)底面集合組織を形 19,21,22) ．また，圧延材に対して曲げ加工 [23][24][25][26] を施すことも集合組織の改質に寄与 * 1 名古屋大学大学院生 (Graduate Student, Nagoya University) * 2 Corresponding author, E-mail: ishiguro.yuya@e.mbox.nagoya-u.ac.jp…”

Section: 緒言unclassified

Effect of Bending-Tension Deformation on Texture Evolution and Room Temperature Formability of AZ31 Alloy Sheet Rolled at High Temperature

Ishiguro

Huang

Tsukada

et al. 2021

J. Japan Inst. Metals and Materials

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Bending-tension deformations were conducted to AZ31B (Mg-3 mass％Al-1 mass％Zn) alloy sheets with weak basal texture intensity and RD (rolling direction)-split texture, which were processed by high-temperature rolling. Effects of process pass number of bending-tension deformation on the texture formation and related room temperature formability were investigated. 1 pass bending-tension deformation contributed to significant increase in the RD-split angle from 13°to 25°, and additional bending-tension deformation only contributed to slight increase in the RD-split angle. 7 pass bending-tension deformation increased basal texture intensity from 2.9 to about 4.5, which was still much lower than those of commercial AZ31B alloy sheets. Specimens subjected to less than 5 pass bending-tension deformations kept significant stretch formability (8.0 mm of Erichsen value). However, specimens subjected to 7 pass bending-tension deformation exhibited deteriorated Erichsen value of 6.7 mm regardless of the high RD-split angle, low basal texture intensity and high average Schmid factor. As a result of microstructural observation, it was revealed that repetition of bending-tension deformation generated area with coarse grains at near surface. In addition, repetition of bending-tension deformation induced duplex microstructure at the surface, where layers of fine grains and coarse grains were distributed along to the RD on the RD-TD (transverse direction) plane. It was suggested that the above microstructural changes induced inhomogeneous deformation at grain boundaries and in double twinning, resulting in the deterioration of the stretch formability of the specimens subjected to 7 pass bending-tension deformation.

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Development of Room Temperature Formability of Rolled Magnesium Alloy Sheets by Texture Control

Cited by 18 publications

References 34 publications

Designing a magnesium alloy with high strength and high formability

Designing a magnesium alloy with high strength and high formability

A new magnesium sheet alloy with high tensile properties and room-temperature formability

Effect of Bending-Tension Deformation on Texture Evolution and Room Temperature Formability of AZ31 Alloy Sheet Rolled at High Temperature

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