Effect of cooling rates on as-cast microstructures of Mg-9Al-xSi（x=1,3） alloys
The effects of cooling rates corresponding to different diameters of the steel mould and laser surface melting（LSM）on the as-cast microstructures of Mg-9Al-xSi（x=1,3）（mass fraction,%）alloys were investigated by XRD and OM.The results show that obvious refinement of the alloy microstructure is obtain...
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| Veröffentlicht in: | Transactions of Nonferrous Metals Society of China 2010, Vol.20 (B07), p.393-396 |
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| container_issue | B07 |
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| container_title | Transactions of Nonferrous Metals Society of China |
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| creator | 李新林 陈彦宾 王香 马国睿 |
| description | The effects of cooling rates corresponding to different diameters of the steel mould and laser surface melting（LSM）on the as-cast microstructures of Mg-9Al-xSi（x=1,3）（mass fraction,%）alloys were investigated by XRD and OM.The results show that obvious refinement of the alloy microstructure is obtained with increasing cooling rate by conventional ingot metallurgy.However, no evident modified morphologies of both dendritic primary Mg2Si and Chinese script eutectic Mg2Si in the Mg-Al-Si alloy occurs. Surprisingly,the morphologies of Mg2Si phases within the laser-melted Mg-Al-Si alloy transform drastically from both coarse Chinese script shape for the eutectic Mg2Si and dendrite for the primary Mg2Si to fine spherical particles with an average size of about 3μm due to the rapid cooling of the melted layer,and the Mg2Si particulates distribute more uniformly in theα-Mg matrix. |
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Surprisingly,the morphologies of Mg2Si phases within the laser-melted Mg-Al-Si alloy transform drastically from both coarse Chinese script shape for the eutectic Mg2Si and dendrite for the primary Mg2Si to fine spherical particles with an average size of about 3μm due to the rapid cooling of the melted layer,and the Mg2Si particulates distribute more uniformly in theα-Mg matrix.</description><identifier>ISSN: 1003-6326</identifier><language>eng</language><subject>Mg2Si ; XSI ; 冷却速度 ; 微观组织 ; 激光表面熔化 ; 球形颗粒 ; 铝硅共晶合金</subject><ispartof>Transactions of Nonferrous Metals Society of China, 2010, Vol.20 (B07), p.393-396</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85276A/85276A.jpg</thumbnail><link.rule.ids>314,780,784,4021</link.rule.ids></links><search><creatorcontrib>李新林 陈彦宾 王香 马国睿</creatorcontrib><title>Effect of cooling rates on as-cast microstructures of Mg-9Al-xSi（x=1,3） alloys</title><title>Transactions of Nonferrous Metals Society of China</title><addtitle>Transactions of Nonferrous Metals Society of China</addtitle><description>The effects of cooling rates corresponding to different diameters of the steel mould and laser surface melting（LSM）on the as-cast microstructures of Mg-9Al-xSi（x=1,3）（mass fraction,%）alloys were investigated by XRD and OM.The results show that obvious refinement of the alloy microstructure is obtained with increasing cooling rate by conventional ingot metallurgy.However, no evident modified morphologies of both dendritic primary Mg2Si and Chinese script eutectic Mg2Si in the Mg-Al-Si alloy occurs. 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Surprisingly,the morphologies of Mg2Si phases within the laser-melted Mg-Al-Si alloy transform drastically from both coarse Chinese script shape for the eutectic Mg2Si and dendrite for the primary Mg2Si to fine spherical particles with an average size of about 3μm due to the rapid cooling of the melted layer,and the Mg2Si particulates distribute more uniformly in theα-Mg matrix.</abstract></addata></record> |
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| identifier | ISSN: 1003-6326 |
| ispartof | Transactions of Nonferrous Metals Society of China, 2010, Vol.20 (B07), p.393-396 |
| issn | 1003-6326 |
| language | eng |
| recordid | cdi_chongqing_backfile_34741883 |
| source | ScienceDirect Journals (5 years ago - present); Alma/SFX Local Collection |
| subjects | Mg2Si XSI 冷却速度 微观组织 激光表面熔化 球形颗粒 铝硅共晶合金 |
| title | Effect of cooling rates on as-cast microstructures of Mg-9Al-xSi（x=1,3） alloys |
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