Microstructural characteristics and mechanical properties of non-combustive Mg–9Al–Zn–Ca magnesium alloy friction stir welded joints

Zhou, Lilong; Nakata, Kohei; Liao, Jinsun; Tsumura, Takuya

doi:10.1016/j.matdes.2012.06.005

Cited by 32 publications

(4 citation statements)

References 32 publications

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“…The changes in hardness are mainly related to the grain size variation, dislocation density and distribution of small particles of intermetallic compounds [27,28,29]. The AZ31B used in this study is not a particle-strengthened material; thus, according to the Hall-Petch equation, grain refinement plays an important role in strengthening [22].…”

Section: Microhardnessmentioning

confidence: 99%

Effects of tool rotational and welding speed on microstructure and mechanical properties of bobbin-tool friction-stir welded Mg AZ31

et al. 2014

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The effects of rotational and welding speeds on the microstructure and mechanical properties of bobbin-tool friction-stir welded (BT-FSW) Mg AZ31 were investigated. The results indicated that the thermo-mechanically affected zone (TMAZ) consisted of equiaxed grains, which were inconsistent with the deformed, rotated and elongated grains found in the TMAZs of BT-FSWed Al alloys and friction-stir welded Al and Mg alloys. The average grain size increased as the ratio of the rotational speed to welding speed increased. Excellent welds with no degradation in hardness were produced using a low heat input. Tensile tests revealed that the ultimate tensile strengths gradually increased with increasing welding speed while keeping the rotational speed constant while the rotational and welding speeds had only slight influences on the yield stresses and fracture elongations.

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Section: Microhardnessmentioning

confidence: 99%

Effects of tool rotational and welding speed on microstructure and mechanical properties of bobbin-tool friction-stir welded Mg AZ31

et al. 2014

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“…Magnesium alloy is considered as advanced material in terms of electromagnetic shielding, energy conservation and environment pollution regulation [2]. But the welding of magnesium alloy is difficult with fusion welding process, due to high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Approach to Study the Effect of Welding Parameters on Similar Friction Stir Welded Joints of AZ31B-O Mg Alloy

Singh

Cheema²,

Kang³

2014

Procedia Engineering

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In this investigation an attempt has been made to study the effect of friction stir welding parameters on mechanical and metallurgical properties of AZ31B-O Mg alloy joints. The selected material was welded using combination of different parameters i.e. tool rotational speed, welding speed and tool shoulder diameter. The effect of weld pitch i.e. ratio of welding speed to tool rotational speed (0.0020 mm/rev to 0.05 mm/rev) was examined on the mechanical and micro structural properties of friction stir welded joints of AZ31B-O Mg alloy. The linear relationship between tensile strength and weld pitch was observed. The maximum value of tensile strength i.e. 187.8 N/mm 2 was obtained at weld pitch of 0.05 mm/rev using 20 mm tool shoulder diameter. Most of the tensile test specimens fractured in the area between Stir Zone (SZ) and Thermo Mechanical Affected Zone (TMAZ) towards the advancing side. The fine and equiaxed grains were observed due to dynamic recrystallization at higher value of weld pitch.

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“…Zhou et al [3] obtained defect-free joints of non-combustive Mg-9Al-Zn-Ca magnesium alloy by FSW with at rotation speeds of 750 and 1000 rpm and at a constant welding speed of 200 mm/min. Yang et al [4][5] discussed the relationship between the rotation rate, texture distribution and mechanical properties at a wide range of rotation rates and the highest rotation rate of 3500 rpm for Mg-3Al-1Zn plates with a thickness of 6.3 mm, and effects of heat input on tensile properties and fracture behavior of friction stir welded AZ31 alloy with different shoulder dimensions.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Friction Stir Welded Mg-1Al-xSn-0.3Mn Magnesium Alloys

Pan

Jiang

et al. 2015

MSF

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For the study of the weldability of new-typed Mg-1Al-xSn-0.3Mn (x=1,3) magnesium alloys, the plates of extruded Mg-1Al-xSn-0.3Mn (x=1,3) magnesium alloys with a thickness of 2.8 mm were friction stir welded by butt. And the microstructure and properties were tested and analyzed by X-ray non-destructive test, OM, SEM, EDS, microhardness and tensile test. The results show that the above-mentioned magnesium alloys could be successfully butt-welded without any defect by friction stir welding, the microstructure in the NZ was fine and equiaxed, and some grains in the TMAZ were elongated in the form of bars. Moreover, the tensile strength of the friction stir weld could reached over 85% that of the base material and the HAZ at advancing side of the weld had the lowest hardness.

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Microstructural characteristics and mechanical properties of non-combustive Mg–9Al–Zn–Ca magnesium alloy friction stir welded joints

Cited by 32 publications

References 32 publications

Effects of tool rotational and welding speed on microstructure and mechanical properties of bobbin-tool friction-stir welded Mg AZ31

Effects of tool rotational and welding speed on microstructure and mechanical properties of bobbin-tool friction-stir welded Mg AZ31

An Experimental Approach to Study the Effect of Welding Parameters on Similar Friction Stir Welded Joints of AZ31B-O Mg Alloy

Microstructure and Properties of Friction Stir Welded Mg-1Al-xSn-0.3Mn Magnesium Alloys

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