添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响

采用拉伸试验、扫描电镜和透射电镜,研究添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响.添加0.10％Zr使合金的抗拉强度提高约105 MPa,而复合添加0.07％Sc和0.07％Zr使合金抗拉强度提高约133 MPa.在峰时效状态的合金中,添加微量Sc和Zr的主要强化机制是Al3(Sc,Zr)和Al3Zr粒子引起的细晶强化、亚晶强化和奥罗万强化.Al3(Sc,Zr)颗粒的尺寸大于Al3Zr颗粒的尺寸,但Al3(Sc,Zr)粒子分布更加弥散,因此,Al3(Sc,Zr)粒子能更加有效钉扎位错运动和抑制再结晶....

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Published in中国有色金属学报（英文版） Vol. 30; no. 6; pp. 1429 - 1438
Main Authors 肖权峰, 黄继武, 蒋莺歌, 江福清, 吴昀峰, 徐国富
Format Journal Article
LanguageChinese
Published 中南大学材料科学与工程学院,长沙,410083%中南大学材料科学与工程学院,长沙 410083 2020
中南大学有色金属材料科学与工程教育部重点实验室,长沙 410083
Subjects
Al3(Sc
Al3Zr
显微组织演变
位错运动
microstructure evolution
Al?Zn?Mg?Cu合金
mechanical properties
strengthening mechanism
Al3(Sc,Zr)
再结晶
力学性能
recrystallization
强化机制
Zr
Al?Zn?Mg?Cu alloys
dislocation motion
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Abstract 采用拉伸试验、扫描电镜和透射电镜,研究添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响.添加0.10％Zr使合金的抗拉强度提高约105 MPa,而复合添加0.07％Sc和0.07％Zr使合金抗拉强度提高约133 MPa.在峰时效状态的合金中,添加微量Sc和Zr的主要强化机制是Al3(Sc,Zr)和Al3Zr粒子引起的细晶强化、亚晶强化和奥罗万强化.Al3(Sc,Zr)颗粒的尺寸大于Al3Zr颗粒的尺寸,但Al3(Sc,Zr)粒子分布更加弥散,因此,Al3(Sc,Zr)粒子能更加有效钉扎位错运动和抑制再结晶.
AbstractList 采用拉伸试验、扫描电镜和透射电镜,研究添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响.添加0.10％Zr使合金的抗拉强度提高约105 MPa,而复合添加0.07％Sc和0.07％Zr使合金抗拉强度提高约133 MPa.在峰时效状态的合金中,添加微量Sc和Zr的主要强化机制是Al3(Sc,Zr)和Al3Zr粒子引起的细晶强化、亚晶强化和奥罗万强化.Al3(Sc,Zr)颗粒的尺寸大于Al3Zr颗粒的尺寸,但Al3(Sc,Zr)粒子分布更加弥散,因此,Al3(Sc,Zr)粒子能更加有效钉扎位错运动和抑制再结晶.
Abstract_FL The effects of minor Sc and Zr additions on the mechanical properties and microstructure evolution of Al?Zn?Mg?Cu alloys were studied using tensile tests, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The ultimate tensile strength of the peak-aged Al?Zn?Mg?Cu alloy is improved by about 105 MPa with the addition of 0.10％ Zr. An increase of about 133 MPa is observed with the joint addition of 0.07％ Sc and 0.07％ Zr. For the alloys modified with the minor addition of Sc and Zr (0.14％), the main strengthening mechanisms of minor addition of Sc and Zr are fine-grain strengthening, sub-structure strengthening and the Orowan strengthening mechanism produced by the Al3(Sc,Zr) and Al3Zr dispersoids. The volume of Al3Zr particles is less than that of Al3(Sc,Zr) particles, but the distribution of Al3(Sc,Zr) particles is more dispersed throughout the matrix leading to pinning the dislocations motion and restraining the recrystallization more effectively.
Author 黄继武
江福清
肖权峰
蒋莺歌
吴昀峰
徐国富
AuthorAffiliation 中南大学材料科学与工程学院,长沙,410083%中南大学材料科学与工程学院,长沙 410083;中南大学有色金属材料科学与工程教育部重点实验室,长沙 410083
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Author_FL Guo-fu XU
Quan-feng XIAO
Ji-wu HUANG
Yun-feng WU
Ying-ge JIANG
Fu-qin JIANG
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Keywords Al3(Sc
Al3Zr
显微组织演变
位错运动
microstructure evolution
Al?Zn?Mg?Cu合金
mechanical properties
strengthening mechanism
Al3(Sc,Zr)
再结晶
力学性能
recrystallization
强化机制
Zr
Al?Zn?Mg?Cu alloys
dislocation motion
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中南大学有色金属材料科学与工程教育部重点实验室,长沙 410083
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Snippet 采用拉伸试验、扫描电镜和透射电镜,研究添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响.添加0.10％Zr使合金的抗拉强度提高约105 MPa,而复合添加0.07％Sc和0.07％Zr使合金抗拉强度提高约133...
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Title 添加微量Sc和Zr对Al?Zn?Mg?Cu合金力学性能和显微组织演变的影响
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