24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相組成。隨著離心半徑和離心轉(zhuǎn)速的增大，Mg-10Gd-3Y-1Sn合金的晶粒尺寸逐漸減小，抗拉伸強(qiáng)度逐漸增大。在700 r/min下制備的熱軋?jiān)嚇釉谑覝叵聵O限抗拉伸強(qiáng)度為304 MPa，在300 ℃下極限抗拉伸強(qiáng)度為296 MPa。Mg24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相具有優(yōu)異的熱穩(wěn)定性，因而Mg-10Gd-3Y-1Sn合金具有優(yōu)異的高溫抗拉伸強(qiáng)度。"/>

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離心鑄造和熱軋對(duì)Mg-10Gd-3Y-1Sn合金組織和機(jī)械性能的影響
作者:
作者單位:

1.重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044;2.重慶大學(xué) 國(guó)家鎂合金材料工程技術(shù)研究中心，重慶 400044

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中圖分類(lèi)號(hào):

基金項(xiàng)目:

the Chongqing Research Program of Basic Research and Frontier Technology (Project No. cstc2019jcyj-msxm0438), the National Key Research and Development Program of China (Project No. 2016YFB0700403 & Project No. 2016YFB0301100), the fundamental Research funds for Central Universities (Project No. 2020CDJDPT001), the 111 Project (Project No. B16007) by the Ministry of Education and the State Administration of Foreign Experts Affairs of China.


Effects of Centrifugal Casting and Hot Rolling on Micro-structure and Mechanical Properties of Mg-10Gd-3Y-1Sn Alloy
Author:
Affiliation:

1.College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2.National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China

Fund Project:

National Key Research and Development Program of China (2016YFB0700403); National Natural Science Foundation of China (51571040); Chongqing Research Program of Basic Research and Frontier Technology (cstc2019jcyj-msxmX0306, cstc2019jcyj-msxmX0539); Fundamental Research Funds for Central Universities (2021CDJJMRH-001); 111 Project of Ministry of Education and State Administration of Foreign Experts Affairs of China (B16007); Sharing Fund of Chongqing University Large-Scale Equipment (201612150024, 201612150092)

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    摘要:

    采用離心鑄造及熱軋工藝制備Mg-10Gd-3Y-1Sn合金，利用X射線衍射、光學(xué)顯微鏡、掃描電子顯微鏡和拉伸試驗(yàn)對(duì)該合金的組織和力學(xué)性能進(jìn)行了研究。結(jié)果表明：離心鑄造Mg-10Gd-3Y-1Sn合金由α-Mg、Mg24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相組成。隨著離心半徑和離心轉(zhuǎn)速的增大，Mg-10Gd-3Y-1Sn合金的晶粒尺寸逐漸減小，抗拉伸強(qiáng)度逐漸增大。在700 r/min下制備的熱軋?jiān)嚇釉谑覝叵聵O限抗拉伸強(qiáng)度為304 MPa，在300 ℃下極限抗拉伸強(qiáng)度為296 MPa。Mg24(Gd, Y)5、Mg2(Sn, Y)3Gd2和Mg3(Gd, Y)相具有優(yōu)異的熱穩(wěn)定性，因而Mg-10Gd-3Y-1Sn合金具有優(yōu)異的高溫抗拉伸強(qiáng)度。

    Abstract:

    The Mg-10Gd-3Y-1Sn alloys were prepared by centrifugal casting and hot rolling, and their microstructure and mechanical properties were investigated by X-ray diffraction, optical microscope, scanning electron microscope, and tensile tests. Results show that the centrifugal-cast Mg-10Gd-3Y-1Sn alloy consists of α-Mg, Mg24(Gd,Y)5, Mg2(Sn,Y)3Gd2, and Mg3(Gd,Y) phases. With increasing the centrifugal radius and rotation speed, the tensile strength of alloys is increased gradually due to the decreased grain size of alloys. The ultimate tensile strength of as-rolled alloys after centrifugal casting with the rotation speed of 700 r/min is 304 and 296 MPa at room temperature and 300 °C, respectively. The improved tensile strength of Mg-10Gd-3Y-1Sn alloy at elevated temperatures mainly results from the Mg24(Gd, Y)5, Mg2(Sn, Y)3Gd2, and Mg3(Gd, Y) phases with excellent thermal stability.

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馬振鐸,楊艷,彭強(qiáng),付雪松,魏國(guó)兵,謝衛(wèi)東,彭曉東.離心鑄造和熱軋對(duì)Mg-10Gd-3Y-1Sn合金組織和機(jī)械性能的影響[J].稀有金屬材料與工程,2022,51(3):858~865.[Ma Zhenduo, Yang Yan, Peng Qiang, Fu Xuesong, Wei Guobing, Xie Weidong, Peng Xiaodong. Effects of Centrifugal Casting and Hot Rolling on Micro-structure and Mechanical Properties of Mg-10Gd-3Y-1Sn Alloy[J]. Rare Metal Materials and Engineering,2022,51(3):858~865.]
DOI：10.12442/j. issn.1002-185X.20210020

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  • 收稿日期:2021-01-08
  • 最后修改日期:2021-08-29
  • 錄用日期:2021-09-26
  • 在線發(fā)布日期: 2022-03-30
  • 出版日期: 2022-03-30