文章信息/Info

Title:

Strengthening and Toughening of Cast Al-Li Alloys: Research Progress and Future Prospect

文章編號:

1674-3962(2022)11-0869-11

作者:

吳國華1; 戚方舟1; 張小龍1; 張亮1; 童鑫1; 李良彬2; 熊訓(xùn)滿2; 丁文江1

（1. 上海交通大學(xué)材料科學(xué)與工程學(xué)院，上海 200240）（2. 江西贛鋒鋰業(yè)股份有限公司，江西 新余 338004）

Author(s):

WU Guohua1;  QI Fangzhou1;  ZHANG Xiaolong1;  ZHANG Liang1;  TONG Xin1;  LI Liangbin2;  XIONG Xunman2;  DING Wenjiang1

(1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) (2. Jiangxi Ganfeng Lithium Co., Ltd., Xinyu 338004, China)

關(guān)鍵詞:

鑄造鋁鋰合金; 強(qiáng)塑性; 合金化; 熱處理; 微觀組織

Keywords:

cast Al-Li alloy;  strength and toughness;  alloying;  heat treatment;  microstructure

分類號:

TG146.21

DOI:

10.7502/j.issn.1674-3962.202206015

文獻(xiàn)標(biāo)志碼:

A

摘要:

鑄造鋁鋰合金具有低密度、高模量、高比強(qiáng)度和比剛度等優(yōu)點(diǎn)，適用于制備復(fù)雜薄壁構(gòu)件，是航空航天、國防軍工行業(yè)理想的結(jié)構(gòu)材料。基于鑄造鋁鋰合金的組織特征，探索提升合金強(qiáng)塑性的有效途徑，可以夯實(shí)鑄造鋁鋰合金在輕量化領(lǐng)域的優(yōu)勢地位，擴(kuò)大其應(yīng)用范圍。首先，概括了國內(nèi)外鑄造鋁鋰合金的發(fā)展歷程，歸納了鑄造鋁鋰合金的組織特征與強(qiáng)韌化機(jī)制。然后，圍繞鑄造鋁鋰合金強(qiáng)韌化研究的最新進(jìn)展，系統(tǒng)分析了合金化與熱處理對鑄造鋁鋰合金微觀組織及力學(xué)性能的影響規(guī)律，總結(jié)了提升鑄造鋁鋰合金強(qiáng)塑性的主要途徑。最后，面向鑄造鋁鋰合金實(shí)際工程需求，對其強(qiáng)韌化處理中尚存的科學(xué)難題與未來的研究方向進(jìn)行了探討與展望。

Abstract:

Cast aluminum-lithium (Al-Li) alloy has the advantages of low density, high modulus, high specific strength and stiffness, and is suitable for the preparation of thin-walled components with complex structure, which is an ideal structural material for aerospace and defense industry. Based on the microstructural characteristics of cast Al-Li alloy, exploring the effective way to enhance the strength and toughness of the alloy can consolidate its advantageous position and expand its application scope in the field of lightweight. In this work, the development history of cast Al-Li alloys at home and abroad was firstly outlined, and the microstructural characteristics along with strengthening and toughening mechanism of cast Al-Li alloys were recapitulated. Then, the influence of alloying and heat treatment on the microstructure and mechanical properties of cast Al-Li alloys were systematically analyzed, and the main ways to improve the toughness of cast Al-Li alloys were summarized. Finally, for the actual engineering needs, the remaining scientific problems on the strengthening and toughening of cast Al�睱i alloys were discussed and the future research directions were prospected.