3Mg2相含量極低，且無(wú)彌散分布的Al3Mg2相。隨著退火溫度的升高，細(xì)長(zhǎng)晶粒的寬度增加，位錯(cuò)密度減小。在75~150 ℃退火后，相比于軋制態(tài)合金，其屈服強(qiáng)度降低8%~33%，極限抗拉伸強(qiáng)度降低1%~12%，延伸率增加16%~83%。此外，分析了各種強(qiáng)化機(jī)制對(duì)屈服強(qiáng)度的貢獻(xiàn)，以及原有位錯(cuò)和Mg溶質(zhì)對(duì)塑性的貢獻(xiàn)。"/>

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低溫退火加工硬化Al-10% Mg合金的顯微組織特點(diǎn)和力學(xué)行為
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作者單位:

1.武漢理工大學(xué) 材料科學(xué)與工程學(xué)院，湖北 武漢 430070;2.江蘇大學(xué) 材料科學(xué)與工程學(xué)院，江蘇 鎮(zhèn)江 212013

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基金項(xiàng)目:

National Natural Science Foundation of China (Grant numbers: U1810108 and U1710124)


Microstructural Characteristics and Mechanical Behavior of Work-Hardened Al-10wt% Mg Alloy Subjected to Low Temperature Annealing
Author:
Affiliation:

1.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;2.School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Fund Project:

National Natural Science Foundation of China (U1810108, U1710124)

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    摘要:

    研究了冷軋減薄率為75%的Al-10% Mg（質(zhì)量分?jǐn)?shù)）合金在75~150 ℃下退火的顯微組織特點(diǎn)和力學(xué)行為。軋制態(tài)和退火態(tài)Al-10% Mg合金的特征是晶粒細(xì)長(zhǎng)，位錯(cuò)密度高，Al3Mg2相含量極低，且無(wú)彌散分布的Al3Mg2相。隨著退火溫度的升高，細(xì)長(zhǎng)晶粒的寬度增加，位錯(cuò)密度減小。在75~150 ℃退火后，相比于軋制態(tài)合金，其屈服強(qiáng)度降低8%~33%，極限抗拉伸強(qiáng)度降低1%~12%，延伸率增加16%~83%。此外，分析了各種強(qiáng)化機(jī)制對(duì)屈服強(qiáng)度的貢獻(xiàn)，以及原有位錯(cuò)和Mg溶質(zhì)對(duì)塑性的貢獻(xiàn)。

    Abstract:

    The Al-10wt% Mg alloy was cold-rolled with the thickness reduction ratio of 75% followed by annealing at 75~150 °C, and its microstructure characteristics and mechanical behavior were investigated. The as-rolled and annealed Al-10wt% Mg alloys are characterized by elongated ultra-fine grains, high density of dislocations, a very small amount of Al3Mg2 phase, and no dispersed distribution of Al3Mg2 phase. With increasing the annealing temperature, the width of elongated ultra-fine grains is increased and the dislocation density is decreased. After annealing at 75~150 °C, compared with those of as-rolled alloys, the yield strength of annealed alloys is decreased by 8%~33%, the ultimate tensile strength is decreased by 1%~12%, and the elongation is increased by 16%~83%. The contributions of various strengthening mechanisms to yield strength and the contributions of preexisting dislocations and Mg solute to ductility were analyzed and discussed.

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散展翼,劉生發(fā),劉志波,林耀軍,劉滿平.低溫退火加工硬化Al-10% Mg合金的顯微組織特點(diǎn)和力學(xué)行為[J].稀有金屬材料與工程,2022,51(5):1550~1557.[San Zhanyi, Liu Shengfa, Liu Zhibo, Lin Yaojun, Liu Manping. Microstructural Characteristics and Mechanical Behavior of Work-Hardened Al-10wt% Mg Alloy Subjected to Low Temperature Annealing[J]. Rare Metal Materials and Engineering,2022,51(5):1550~1557.]
DOI：10.12442/j. issn.1002-185X.20210223

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  • 收稿日期:2021-03-16
  • 最后修改日期:2021-04-30
  • 錄用日期:2021-05-13
  • 在線發(fā)布日期: 2022-05-31
  • 出版日期: 2022-05-30