文章信息/Info

Title:

Correlations between Properties and Structures of Al-Li Alloys and Novel Alloy Design

文章編號:

1674-3962(2022)10-0796-12

作者:

李勁風1; 李昊然1; 王正安2

（1. 中南大學材料科學與工程學院 有色金屬材料科學與工程教育部重點實驗室，湖南 長沙 410083） (2. 西南鋁業（集團）有限責任公司， 重慶401326）

Author(s):

LI Jinfeng1;  LI Haoran1;  WANG Zheng’an2

(1. Key Laboratory of Nonferrous Metal Materials Science and Engineering of Ministry of Education, School of Materials Science and Engineering, Central South University, Changsha 410083, China) (2. Southwest Aluminum (Group) Co., Ltd., Chongqing 401326, China)

關鍵詞:

鋁鋰合金; 時效析出相; 超高強; 耐損傷; 耐腐蝕; 淬透性

Keywords:

Al-Li alloy;  aging precipitates;  super-high strength;  damage resistance;  corrosion resistance;  hardenability

分類號:

TG146.2

DOI:

10.7502/j.issn.1674-3962.202206018

文獻標志碼:

A

摘要:

鋁鋰合金具有低密度、高彈性模量、高比強度和比剛度、低疲勞裂紋擴展速率、較好的高溫及低溫性能等特性，是理想的航空航天材料。國際上十分重視鋁鋰合金新材料開發，并不斷推出新的鋁鋰合金牌號。介紹了鋁鋰合金中的主要時效析出相，綜述了鋁鋰合金力學性能、耐腐蝕性能、疲勞裂紋擴展速率與時效析出相的相關性。結合合金化元素含量及微合金化元素對鋁鋰合金時效析出相的影響，介紹了高強、超高強鋁鋰合金，耐腐蝕鋁鋰合金，耐損傷鋁鋰合金，高淬透性鋁鋰合金的開發情況，總結了國內新型鋁鋰合金開發的不足，提出了未來新型鋁鋰合金的研究方向。

Abstract:

Al-Li alloys are ideal aerospace materials due to their properties such as low density, high elastic modulus, high specific stiffness and strength, low fatigue crack propagation rate, good property at high and cryogenic temperatures. The research on novel Al-Li alloy materials attracted great attention all over the world, and new Al-Li alloy brands have been registered constantly. This paper introduces the main aging precipitates in Al-Li alloys, and summarizes the correlation between aging precipitates and mechanical properties, corrosion properties and fatigue crack propagation rate of Al-Li alloys. Combined with the influence of alloying elements and microalloying elements on the aging precipitates, the development of high strength and super-high strength Al-Li alloys, corrosion resistant Al-Li alloys, damage resistant Al-Li alloys and high hardenability Al-Li alloys is introduced. The shortcomings of domestic development of novel Al-Li alloys are summarized, and some development directions on Al-Li alloys in the future are proposed.