Effects of Cd and Sn on double-peak age-hardening behaviors of Al-Si-Cu- Mg cast alloys

The effects of trace elements Cd and Sn on precipitation process of Al-Si-Cu-Mg cast alloys were investigated in the present research. It is shown that the addition of Cd and Sn not only increases remarkably the aging peak hardness and reduces the time to reach aging peak, but also eliminates the do...

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Published in:China foundry 2010-02, Vol.7 (1), p.1-5
Main Author: Li Runxia Chen Yujin Yuan Xiaoguang Qu Yingdong Li Rongde
Format: Article
Language:English
Subjects:
age-hardening
Al-Si-Cu-Mg cast alloys
Cd /Sn addition
precipitation
时效硬化
时间间隔
铜镁合金
铸造性能
锡元素
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description The effects of trace elements Cd and Sn on precipitation process of Al-Si-Cu-Mg cast alloys were investigated in the present research. It is shown that the addition of Cd and Sn not only increases remarkably the aging peak hardness and reduces the time to reach aging peak, but also eliminates the double-aging-peak phenomenon which appears in Al-Si-Cu-Mg alloys. In Al-Si-Cu-Mg alloys the first aging peak corresponds to GP zones （especially GP Ⅱ）, and the second one is caused by metastable phases. The obvious time interval of transition from GP Ⅱ to metastable phases associates with the double-aging-peak phenomenon. The results of DSC and TEM show that Cd/Sn elements suppress the formation of GP Ⅰzone, stimulate the formation of θ＂, θ＇ and θ phases, and then shorten remarkably the temperature intervals of each exothermic peak. Because the transition interval between GP Ⅱ zone and metastable phases is shortened by Cd/Sn in Al-Si-Cu-Mg cast alloys, θ＇ phase coexists with θ phase in matrix of ageing peak condition, which causes effective hardening on the alloys, and at the same time, eliminates the double-aging-peak phenomenon.
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It is shown that the addition of Cd and Sn not only increases remarkably the aging peak hardness and reduces the time to reach aging peak, but also eliminates the double-aging-peak phenomenon which appears in Al-Si-Cu-Mg alloys. In Al-Si-Cu-Mg alloys the first aging peak corresponds to GP zones （especially GP Ⅱ）, and the second one is caused by metastable phases. The obvious time interval of transition from GP Ⅱ to metastable phases associates with the double-aging-peak phenomenon. The results of DSC and TEM show that Cd/Sn elements suppress the formation of GP Ⅰzone, stimulate the formation of θ＂, θ＇ and θ phases, and then shorten remarkably the temperature intervals of each exothermic peak. Because the transition interval between GP Ⅱ zone and metastable phases is shortened by Cd/Sn in Al-Si-Cu-Mg cast alloys, θ＇ phase coexists with θ phase in matrix of ageing peak condition, which causes effective hardening on the alloys, and at the same time, eliminates the double-aging-peak phenomenon.</description><identifier>ISSN: 1672-6421</identifier><identifier>EISSN: 2365-9459</identifier><language>eng</language><publisher>Institute of Material Science and Engineering, Shenyang University of Technology, Shenyang 110178, China</publisher><subject>age-hardening ; Al-Si-Cu-Mg cast alloys ; Cd /Sn addition ; precipitation ; 时效硬化 ; 时间间隔 ; 铜镁合金 ; 铸造性能 ; 锡元素</subject><ispartof>China foundry, 2010-02, Vol.7 (1), p.1-5</ispartof><rights>Copyright © Wanfang Data Co. Ltd. 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It is shown that the addition of Cd and Sn not only increases remarkably the aging peak hardness and reduces the time to reach aging peak, but also eliminates the double-aging-peak phenomenon which appears in Al-Si-Cu-Mg alloys. In Al-Si-Cu-Mg alloys the first aging peak corresponds to GP zones （especially GP Ⅱ）, and the second one is caused by metastable phases. The obvious time interval of transition from GP Ⅱ to metastable phases associates with the double-aging-peak phenomenon. The results of DSC and TEM show that Cd/Sn elements suppress the formation of GP Ⅰzone, stimulate the formation of θ＂, θ＇ and θ phases, and then shorten remarkably the temperature intervals of each exothermic peak. Because the transition interval between GP Ⅱ zone and metastable phases is shortened by Cd/Sn in Al-Si-Cu-Mg cast alloys, θ＇ phase coexists with θ phase in matrix of ageing peak condition, which causes effective hardening on the alloys, and at the same time, eliminates the double-aging-peak phenomenon.</description><subject>age-hardening</subject><subject>Al-Si-Cu-Mg cast alloys</subject><subject>Cd /Sn addition</subject><subject>precipitation</subject><subject>时效硬化</subject><subject>时间间隔</subject><subject>铜镁合金</subject><subject>铸造性能</subject><subject>锡元素</subject><issn>1672-6421</issn><issn>2365-9459</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNotkN9LwzAQx4soOOb-h-CbD4E0TdLkcZSpg4kPU3wMl19dt5rMtlO2v966-eXg4O57nzvuKpvQQnCsGFfX2SQXJcWC0fw2m_X9lowSUhDBJ9nHIgRvhx6lgCqHIDq0jihF5NLBtB7vPewQ1B5voHM-NrFGxm_gu0ndeWbe4nWDqwNGLzWy0A8I2jYd-7vsJkDb-9l_nmbvj4u36hmvXp-W1XyFLc3pgFVuDCkVeFs4CmCNYYQYmXvhFA-ScCFBSVZSy3PFoXBBcOE8874Ea0tTTLPlhesSbPW-az6hO-oEjT4XUldr6IbGtl4H6uQIBW5NyagHKUEAKZzKA5Ol8SPr4cL6gRgg1nqbDl0cr9enTYp1fTpRkpNzjN77i9f-tb7Gv2gDdheacVExSrGyKH4B21V01A</recordid><startdate>20100201</startdate><enddate>20100201</enddate><creator>Li Runxia Chen Yujin Yuan Xiaoguang Qu Yingdong Li Rongde</creator><general>Institute of Material Science and Engineering, Shenyang University of Technology, Shenyang 110178, China</general><general>Foundry Journal Agency</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope><scope>DOA</scope></search><sort><creationdate>20100201</creationdate><title>Effects of Cd and Sn on double-peak age-hardening behaviors of Al-Si-Cu- Mg cast alloys</title><author>Li Runxia Chen Yujin Yuan Xiaoguang Qu Yingdong Li Rongde</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c212t-91bb079aec3d2aacbb400b81e6d95f80568a98472c5195a3df656de4ee7acc7b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>age-hardening</topic><topic>Al-Si-Cu-Mg cast alloys</topic><topic>Cd /Sn addition</topic><topic>precipitation</topic><topic>时效硬化</topic><topic>时间间隔</topic><topic>铜镁合金</topic><topic>铸造性能</topic><topic>锡元素</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li Runxia Chen Yujin Yuan Xiaoguang Qu Yingdong Li Rongde</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>China foundry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li Runxia Chen Yujin Yuan Xiaoguang Qu Yingdong Li Rongde</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Cd and Sn on double-peak age-hardening behaviors of Al-Si-Cu- Mg cast alloys</atitle><jtitle>China foundry</jtitle><addtitle>China Foundry</addtitle><date>2010-02-01</date><risdate>2010</risdate><volume>7</volume><issue>1</issue><spage>1</spage><epage>5</epage><pages>1-5</pages><issn>1672-6421</issn><eissn>2365-9459</eissn><abstract>The effects of trace elements Cd and Sn on precipitation process of Al-Si-Cu-Mg cast alloys were investigated in the present research. It is shown that the addition of Cd and Sn not only increases remarkably the aging peak hardness and reduces the time to reach aging peak, but also eliminates the double-aging-peak phenomenon which appears in Al-Si-Cu-Mg alloys. In Al-Si-Cu-Mg alloys the first aging peak corresponds to GP zones （especially GP Ⅱ）, and the second one is caused by metastable phases. The obvious time interval of transition from GP Ⅱ to metastable phases associates with the double-aging-peak phenomenon. The results of DSC and TEM show that Cd/Sn elements suppress the formation of GP Ⅰzone, stimulate the formation of θ＂, θ＇ and θ phases, and then shorten remarkably the temperature intervals of each exothermic peak. Because the transition interval between GP Ⅱ zone and metastable phases is shortened by Cd/Sn in Al-Si-Cu-Mg cast alloys, θ＇ phase coexists with θ phase in matrix of ageing peak condition, which causes effective hardening on the alloys, and at the same time, eliminates the double-aging-peak phenomenon.</abstract><pub>Institute of Material Science and Engineering, Shenyang University of Technology, Shenyang 110178, China</pub><tpages>5</tpages><oa>free_for_read</oa></addata></record>
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subjects age-hardening
Al-Si-Cu-Mg cast alloys
Cd /Sn addition
precipitation
时效硬化
时间间隔
铜镁合金
铸造性能
锡元素
title Effects of Cd and Sn on double-peak age-hardening behaviors of Al-Si-Cu- Mg cast alloys
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