Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions
The effects of Mn addition on the room temperature tensile strength and deformation mechanisms of as-cast Mg-8Al-1Nd-1.5Gd-<i>x</i>Mn alloys (<i>x</i> = 0, 0.3, 0.5, 1.0 wt.%) are investigated in this paper. The results indicate that the addition of Mn contributes to the prec...
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MDPI AG
2023-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/20/6747 |
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| author | Jiandong Yang Wuxiao Wang Min Zhang Jian Liu Shaoyong Qin |
| author_facet | Jiandong Yang Wuxiao Wang Min Zhang Jian Liu Shaoyong Qin |
| author_sort | Jiandong Yang |
| collection | DOAJ |
| description | The effects of Mn addition on the room temperature tensile strength and deformation mechanisms of as-cast Mg-8Al-1Nd-1.5Gd-<i>x</i>Mn alloys (<i>x</i> = 0, 0.3, 0.5, 1.0 wt.%) are investigated in this paper. The results indicate that the addition of Mn contributes to the precipitation of Al-Mn-RE intermetallics and the refinement of <i>α</i>-Mg matrices, thereby improving the tensile strength of the 1.0 Mn alloy at 190 MPa. The fracture mechanism of Mn-containing alloys transforms from a cleavage fracture to a ductile fracture as the Mn content increases from 0.3 to 1.0 wt.%. The presence of intermetallic particles in the dimples confirms the hindrance effect of Al<sub>10</sub>Mn<sub>2</sub> (Nd,Gd) on dislocation slips. The novel technology of in-grain misorientation axes (IGMAs) is used to identify activated slip modes and deformation twins. It can be concluded that the activated pyramidal <i><a></i> slip during tensile deformation significantly promotes the ductility of the 1.0 Mn alloy with an elongation rate of 9.8%. It is worth noting that reducing the coarse <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> tensile twins and enhancing the proportion of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>1</mn></mrow></mfenced></mrow></semantics></math></inline-formula> compressive twins and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>1</mn></mrow></mfenced></mrow></semantics></math></inline-formula>-<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> double twins contributes to maintaining the continuous plastic deformation of Mg alloy. |
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| spelling | doaj.art-e8c2db4667ea4b80997ce7b2e0952b932023-11-19T17:11:44ZengMDPI AGMaterials1996-19442023-10-011620674710.3390/ma16206747Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn AdditionsJiandong Yang0Wuxiao Wang1Min Zhang2Jian Liu3Shaoyong Qin4School of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaFaculty of Printing, Packaging and Digital Media, Xi’an University of Technology, Xi’an 710054, ChinaSchool of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, ChinaThe effects of Mn addition on the room temperature tensile strength and deformation mechanisms of as-cast Mg-8Al-1Nd-1.5Gd-<i>x</i>Mn alloys (<i>x</i> = 0, 0.3, 0.5, 1.0 wt.%) are investigated in this paper. The results indicate that the addition of Mn contributes to the precipitation of Al-Mn-RE intermetallics and the refinement of <i>α</i>-Mg matrices, thereby improving the tensile strength of the 1.0 Mn alloy at 190 MPa. The fracture mechanism of Mn-containing alloys transforms from a cleavage fracture to a ductile fracture as the Mn content increases from 0.3 to 1.0 wt.%. The presence of intermetallic particles in the dimples confirms the hindrance effect of Al<sub>10</sub>Mn<sub>2</sub> (Nd,Gd) on dislocation slips. The novel technology of in-grain misorientation axes (IGMAs) is used to identify activated slip modes and deformation twins. It can be concluded that the activated pyramidal <i><a></i> slip during tensile deformation significantly promotes the ductility of the 1.0 Mn alloy with an elongation rate of 9.8%. It is worth noting that reducing the coarse <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> tensile twins and enhancing the proportion of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>1</mn></mrow></mfenced></mrow></semantics></math></inline-formula> compressive twins and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>1</mn></mrow></mfenced></mrow></semantics></math></inline-formula>-<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn></mrow></mfenced></mrow></semantics></math></inline-formula> double twins contributes to maintaining the continuous plastic deformation of Mg alloy.https://www.mdpi.com/1996-1944/16/20/6747magnesium alloymechanical propertiesfracture mechanismdislocation slipdeformation twin |
| spellingShingle | Jiandong Yang Wuxiao Wang Min Zhang Jian Liu Shaoyong Qin Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions Materials magnesium alloy mechanical properties fracture mechanism dislocation slip deformation twin |
| title | Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions |
| title_full | Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions |
| title_fullStr | Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions |
| title_full_unstemmed | Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions |
| title_short | Improving Mechanical Properties of Mg-Al-RE Alloys with the Formed Dimples of Al<sub>10</sub>Mn<sub>2</sub>RE Particles and Activated Pyramidal <<i>a</i>> Slip with Mn Additions |
| title_sort | improving mechanical properties of mg al re alloys with the formed dimples of al sub 10 sub mn sub 2 sub re particles and activated pyramidal i a i slip with mn additions |
| topic | magnesium alloy mechanical properties fracture mechanism dislocation slip deformation twin |
| url | https://www.mdpi.com/1996-1944/16/20/6747 |
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