Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure
The joining of titanium/magnesium (Ti/Mg) bimetals presents challenges due to the low mutual solubility and absence of metallurgical reactions between Ti and Mg. Herein we utilized the Ni-coated Ti6Al4V lattice structure to enhance the interfacial property of Ti6Al4V/AZ91D bimetal prepared by compou...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025432 |
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| author | Yuanbing Wu Jianhua Zhao Zhiwei Zhang Cheng Gu Fan Wang |
| author_facet | Yuanbing Wu Jianhua Zhao Zhiwei Zhang Cheng Gu Fan Wang |
| author_sort | Yuanbing Wu |
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| description | The joining of titanium/magnesium (Ti/Mg) bimetals presents challenges due to the low mutual solubility and absence of metallurgical reactions between Ti and Mg. Herein we utilized the Ni-coated Ti6Al4V lattice structure to enhance the interfacial property of Ti6Al4V/AZ91D bimetal prepared by compound casting. The Box-Behnken design (BBD) was employed to optimize the lattice design. The resulting structure featured struts with a diameter (ds) of 2.4 mm, an aspect ratio (l/ds) ratio of 5.4, a tilt angle (ω) of 57°, and a node-to-strut diameter ratio (dn/ds) of 2.4. The optimized Ti6Al4V lattice structure manufactured by selective laser melting (SLM) exhibited α′ martensite with a high dislocation density, conferring exceptional tensile strength. The rough texture of the lattice surface enhanced adhesion with the Ni coating and improved wetting and reactivity between Ni and AZ91D alloy melt. This resulted in the formation of a serrated metallurgical interface with AZ91D alloy, which was primarily composed of α-Mg + Mg2Ni eutectic structure+τ-Ni2Mg3Al ternary phases. An impressive joining strength of 116.1 MPa was obtained under the optimized lattice structure, and the bimetal joint predominantly fails through the damage of AZ91D, aligning closely with simulated failure predictions. |
| format | Article |
| id | doaj-art-8bcfabe0f50c49279040f7f13ab00762 |
| institution | Kabale University |
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| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| spelling | doaj-art-8bcfabe0f50c49279040f7f13ab007622024-12-26T08:55:15ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013361146129Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structureYuanbing Wu0Jianhua Zhao1Zhiwei Zhang2Cheng Gu3Fan Wang4College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; National Key Laboratory of Advanced Casting Technologies, Chongqing, 400044, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China.College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; National Key Laboratory of Advanced Casting Technologies, Chongqing, 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; Chongqing Pump Industry Co., LTD, Chongqing, 400033, ChinaThe joining of titanium/magnesium (Ti/Mg) bimetals presents challenges due to the low mutual solubility and absence of metallurgical reactions between Ti and Mg. Herein we utilized the Ni-coated Ti6Al4V lattice structure to enhance the interfacial property of Ti6Al4V/AZ91D bimetal prepared by compound casting. The Box-Behnken design (BBD) was employed to optimize the lattice design. The resulting structure featured struts with a diameter (ds) of 2.4 mm, an aspect ratio (l/ds) ratio of 5.4, a tilt angle (ω) of 57°, and a node-to-strut diameter ratio (dn/ds) of 2.4. The optimized Ti6Al4V lattice structure manufactured by selective laser melting (SLM) exhibited α′ martensite with a high dislocation density, conferring exceptional tensile strength. The rough texture of the lattice surface enhanced adhesion with the Ni coating and improved wetting and reactivity between Ni and AZ91D alloy melt. This resulted in the formation of a serrated metallurgical interface with AZ91D alloy, which was primarily composed of α-Mg + Mg2Ni eutectic structure+τ-Ni2Mg3Al ternary phases. An impressive joining strength of 116.1 MPa was obtained under the optimized lattice structure, and the bimetal joint predominantly fails through the damage of AZ91D, aligning closely with simulated failure predictions.http://www.sciencedirect.com/science/article/pii/S2238785424025432Titanium/magnesium bimetalCompound castingTi6Al4V lattice structureNi coatingInterfacial strengthening |
| spellingShingle | Yuanbing Wu Jianhua Zhao Zhiwei Zhang Cheng Gu Fan Wang Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure Journal of Materials Research and Technology Titanium/magnesium bimetal Compound casting Ti6Al4V lattice structure Ni coating Interfacial strengthening |
| title | Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure |
| title_full | Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure |
| title_fullStr | Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure |
| title_full_unstemmed | Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure |
| title_short | Improving interface joining strength of Ti6Al4V/AZ91D bimetal prepared by compound casting via Ni-coated Ti6Al4V lattice structure |
| title_sort | improving interface joining strength of ti6al4v az91d bimetal prepared by compound casting via ni coated ti6al4v lattice structure |
| topic | Titanium/magnesium bimetal Compound casting Ti6Al4V lattice structure Ni coating Interfacial strengthening |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025432 |
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