Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy
A kind of Al-Zn-Mg-Cu alloy containing 9.6%(mass fraction) Zn element was produced by the Hot-top semi-continuous DC casting technology. The microstructure of the alloy and the temperature of phases transformation were investigated by optical microscopy(OM),transmission electron microscopy(TEM) and...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2016-12-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.12.007 |
| _version_ | 1797967053089406976 |
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| author | YANG Shou-jie XING Qing-yuan YU Hai-jun WANG Yu-ling ZANG Jin-xin DAI Sheng-long |
| author_facet | YANG Shou-jie XING Qing-yuan YU Hai-jun WANG Yu-ling ZANG Jin-xin DAI Sheng-long |
| author_sort | YANG Shou-jie |
| collection | DOAJ |
| description | A kind of Al-Zn-Mg-Cu alloy containing 9.6%(mass fraction) Zn element was produced by the Hot-top semi-continuous DC casting technology. The microstructure of the alloy and the temperature of phases transformation were investigated by optical microscopy(OM),transmission electron microscopy(TEM) and differential scanning calorimetry(DSC) respectively.The hardness and tensile properties of the alloy were tested,and the fracture was studied by scanning electron microscopy(SEM).Results show that the as-cast microstructure of this alloy is fine and has less intergranular eutectic phases, with the melting temperature of 473.4℃. Therefore, the homogenization heat-treatment is 465℃/24h. After the homogenization heat-treatment, the grain boundary of the ingot has turned to be intermittent and the phases have dissolved significantly. Besides, the systematic experiments were conducted on the T6 and RRA of this alloy after extrusion. The results show that on the condition of 135℃/12h treatment, the highest hardness is 197.7HBS, and the tensile strength, yield strength, elongation are 727.5, 718.0MPa and 9.3% respectively. On the condition of 120℃/24h+190℃/5min+135℃/3h treatment, the highest hardness is 204.7HBS, and the tensile strength, yield strength, elongation can reach 764.0, 749.0MPa and 7.2% respectively. |
| first_indexed | 2024-04-11T02:25:05Z |
| format | Article |
| id | doaj.art-b5cdadf9353c426bb0f9e9d0cb5b7705 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:25:05Z |
| publishDate | 2016-12-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-b5cdadf9353c426bb0f9e9d0cb5b77052023-01-02T22:55:36ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812016-12-014412414710.11868/j.issn.1001-4381.2016.12.00720161207Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu AlloyYANG Shou-jie0XING Qing-yuan1YU Hai-jun2WANG Yu-ling3ZANG Jin-xin4DAI Sheng-long5Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China;A kind of Al-Zn-Mg-Cu alloy containing 9.6%(mass fraction) Zn element was produced by the Hot-top semi-continuous DC casting technology. The microstructure of the alloy and the temperature of phases transformation were investigated by optical microscopy(OM),transmission electron microscopy(TEM) and differential scanning calorimetry(DSC) respectively.The hardness and tensile properties of the alloy were tested,and the fracture was studied by scanning electron microscopy(SEM).Results show that the as-cast microstructure of this alloy is fine and has less intergranular eutectic phases, with the melting temperature of 473.4℃. Therefore, the homogenization heat-treatment is 465℃/24h. After the homogenization heat-treatment, the grain boundary of the ingot has turned to be intermittent and the phases have dissolved significantly. Besides, the systematic experiments were conducted on the T6 and RRA of this alloy after extrusion. The results show that on the condition of 135℃/12h treatment, the highest hardness is 197.7HBS, and the tensile strength, yield strength, elongation are 727.5, 718.0MPa and 9.3% respectively. On the condition of 120℃/24h+190℃/5min+135℃/3h treatment, the highest hardness is 204.7HBS, and the tensile strength, yield strength, elongation can reach 764.0, 749.0MPa and 7.2% respectively.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.12.007Al-Zn-Mg-Cu alloyheat-treatmentagingmechanical property |
| spellingShingle | YANG Shou-jie XING Qing-yuan YU Hai-jun WANG Yu-ling ZANG Jin-xin DAI Sheng-long Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy Cailiao gongcheng Al-Zn-Mg-Cu alloy heat-treatment aging mechanical property |
| title | Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy |
| title_full | Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy |
| title_fullStr | Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy |
| title_full_unstemmed | Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy |
| title_short | Heat-treatment Process of a New High Zinc Al-Zn-Mg-Cu Alloy |
| title_sort | heat treatment process of a new high zinc al zn mg cu alloy |
| topic | Al-Zn-Mg-Cu alloy heat-treatment aging mechanical property |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.12.007 |
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