Correlation Between Intergranular Corrosion Behavior and Aging Treatment of 2099 Al-Li Alloy

doi:10.11902/1005.4537.2014.017

Journal of Chinese Society for Corrosion and protection

2014, Vol. 34

Issue (5): 419-425 DOI: 10.11902/1005.4537.2014.017

Current Issue | Archive | Adv Search

Correlation Between Intergranular Corrosion Behavior and Aging Treatment of 2099 Al-Li Alloy

XU Long¹, YAO Xi¹, LI Jingfeng¹(

), CAI Chao²

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China
2. School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750001, China

Download:

HTML

PDF(3283KB)
Export: BibTeX | EndNote (RIS)

Abstract

The correlation between the intergranular corrosion (IGC) behavior and the aging temper (including T6 aging at 150 and 175 ℃, T8 aging at 150 ℃) of 2099 Al-Li alloy was investigated. Then a diagram was established to describe the relation of IGC with the aging procedure. According to the aging resulted corrosion morphology of the alloy, the aging process might be divided into four stages: i.e. stage I is the initial aging stage, stage II the under-aging stage, stage III the near-optimal aging stage and stage IV the over-aging stage. The aged alloy showed different modes corrosion after aged by different stages: i.e. pitting corrosion or local intergranular corrosion (LIGC) for stage I; general intergranular corrosion (GIGC) for stage II; LIGC for stage III; and pitting corrosion without IGC for stage IV. In the under-aged alloy, a great number of very fine precipitates preferentially deposited along grain boundaries, which seem like a continuous chain, hence resulting in the highest susceptibility to IGC for the alloy. In the over-aged alloy, the precipitates were coarsened and the inter-precipitate spacing became larger, so that the susceptibility to IGC may be suppressed. In general, with the rising of aging temperature, the grain boundary precipitates grew coarse and the spacing between the precipitates became larger, while a proper pre-deformation of the alloy might facilitate the uniform nucleation of precipitates and suppress the formation of precipitate-free zone (PFZ) along grain boundary. These two factors shortened or even eliminated the Stage II and Stage III, therewith increasing the resistance to IGC of the alloy.

Key words: 2099 Al-Li alloy intergranular corrosion corrosion-aging diagram

ZTFLH:	TG166
	TG178

	Service

	E-mail this article
	Add to citation manager
	E-mail Alert
	RSS
	（）
	Articles by authors
	Long XU
	Xi YAO
	Jingfeng LI
	Chao CAI

Cite this article:

XU Long, YAO Xi, LI Jingfeng, CAI Chao. Correlation Between Intergranular Corrosion Behavior and Aging Treatment of 2099 Al-Li Alloy. Journal of Chinese Society for Corrosion and protection, 2014, 34(5): 419-425.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2014.017 OR https://www.jcscp.org/EN/Y2014/V34/I5/419

Table 1 Aging temperature and aging time of three tempers

Fig.1 Representative sectional corrosion morphologies of 2099 Al-Li alloy with T6 aging at 150 ℃ for 0.5 h (a), 3 h (b), 18 h (c), 120 h (d) and 150 h (e)

Fig.2 Representative sectional corrosion morphologies of 2099 Al-Li alloy with T6 aging at 175 ℃ for 0.5 h (a), 3 h (b), 18 h (c) and 48 h (d)

Fig.3 Representative sectional corrosion morphologies of the 2099 Al-Li alloy with T8 treatment at 150 ℃ for 0.5 h (a), 3 h (b) and 6 h (c)

Fig.4 Micro-hardness curves of 2099 Al-Li alloys as a function of aging time

Table 2 Corrosion modes of 2099 Al-Li alloy with various aging-treatments and corresponding measured maximum IGC depth

Fig.5 Corrosion diagram of the studied Al-Li alloy treated in different aging conditions

Fig.6 TEM images of the local region adjacent to the grain boundary for 2099 Al-Li alloy with T6 aging at 150 ℃ for 48 h (a) and 195 h (b)

Fig.7 TEM images of the local region around grain boundary for 2099 Al-Li alloy after T6 aging at 175 ℃ (a) and T8 aging at 150 ℃ (b) for 48 h

[1]	Zheng Z Q, LI J F, Chen Z G, et al. Alloying and microstructure evolution of Al-Li alloys[J]. Trans. Nonferrous Met. Soc. China, 2011, 21(10): 2337-2351
	(郑子樵, 李劲风, 陈志国等. 铝锂合金的合金化与微观组织演化[J]. 中国有色金属学报, 2011, 21(10): 2337-2351)
[2]	Lin Y, Zheng Z Q, Han Y, et al. Microstructure and properties of 2099 Al-Li alloy[J]. Trans. Nonferrous Met. Soc. China, 2012, 22(8): 2181-2186
	(林毅, 郑子樵, 韩烨等. 热处理工艺对2A97铝锂合金拉伸性能和腐蚀性能的影响[J]. 中国有色金属学报, 2012, 22(8): 2181-2186)
[3]	Wei X Y, Tan C Y, Zheng Z Q, et al. Influence of aging on corrosion behavior of 2195 Al-Li alloy[J]. Trans. Nonferrous Met. Soc. China, 2004, 14(7): 1195-2000
	(魏修宇, 谭澄宇, 郑子樵等. 时效对2195铝锂合金腐蚀行为的影响[J]. 中国有色金属学报, 2004, 14(7): 1195-2000)
[4]	Wang H N, Jin L. Influence of heat treatment on intercrystalline corrosion and spalling corrosion of 1420 Al-Li alloy[J]. Heat Treat. Met., 2005, 30(10): 20-22
	(王赫男, 金雷. 热处理对1420铝锂合金晶间腐蚀和剥蚀性能的影响[J]. 金属热处理, 2005, 30(10): 20-22)
[5]	Rinker J G, Marek M, Sanders J T H,, Microstructure,toughness SCC behavior of 2020 [A]. Second International Aluminum-Lithium Conference [C]. Monterey, California, 1983
[6]	Connolly B J, Scully J R. Corrosion cracking susceptibility in Al-Li-Cu alloys 2090 and 2096 as a function of isothermal aging time[J]. Scr. Mater., 2000, 42: 1039-1045
[7]	Li J F, Zhang Z, Zhang J Q, et al. Review of research on corrosion behavior of Al-Li alloys[J]. J. Chin. Soc. Corros. Prot., 2003, 23(5): 316-320
	(李劲风, 张昭, 张鉴清等. 铝-锂合金腐蚀性能研究综述[J]. 中国腐蚀与防护学报, 2003, 23(5): 316-320)
[8]	Svenningsen G, Larsen M H, Walmsley J C, et al. Effect of artificial aging on intergranular corrosion of extruded AlMgSi alloy with small Cu content[J]. Corros. Sci., 2006, 48(6): 1528-1543
[9]	Lin Y, Zheng Z Q, Li S C, et al. Microstructures and properties of 2099 Al-Li alloy[J]. Trans. Nonferrous Met. Soc. China, 2013, 23(7): 1848-1854
	(林毅, 郑子樵, 李世晨等. 2099铝锂合金微观组织及性能[J]. 中国有色金属学报, 2013, 23(7): 1848-1854
[10]	Buchheit R Gm, Mathur D, Gouma P I. Corrosion and Corrosion Prevention of Low Density Metals and Alloys [M]. Ohio: The Electrochemical Society Inc., 2001
[11]	Kertz J E, Gouma P I, Buchheit R G. Localized corrosion susceptibility of Al-Li-Cu-Mg-Zn alloyAF/C458 due to interrupted quenc hing from solutionizing temperature[J]. Metall. Mater. Trans., 2001, 32(10)A: 2561-2573
[12]	Padgett B N. Investigation into the stress corrosion cracking properties of AA2099, an Al-Li-Cu alloy [D]. Ohio: Ohio State University, 2008
[13]	Buchheit R G, Moran J P, Stone G E. Electrochemical behavior of the T1 (Al2CuLi) intermetallic compound and its role in localized corrosion of Al-2%Li-3%Cu alloys[J]. Corrosion, 1994, 50(2): 120-130
[14]	Li J F, Li C X, Peng Z W, et al. Corrosion mechanism associated with T1 and T2 precipitates of Al-Cu-Li alloys in NaCl solution[J]. J. Alloys Compd., 2008, 460(1): 688-693
[15]	Li H Y, Zheng Z D, Wang L X, et al. Study on exfoliation corrosion of T6 aged T8 aged of a new type Al-Cu-Li alloy[J]. Trans. Mater. Heat Treat., 2007, 28(6): 134-147
	(李红英, 曾再得, 王娄翔等. 时效状态对新型 Al-Cu-Li 系合金剥落腐蚀性能的影响[J]. 材料热处理学报, 2007, 28(6): 134-138)

[1]	Hui LIU,Wei QIU,Bin LENG,Guojun YU. Corrosion Behavior of 304 and 316H Stainless Steels in Molten LiF-NaF-KF[J]. 中国腐蚀与防护学报, 2019, 39(1): 51-58.
[2]	Xiwu LIU,Xiaoyan ZHAO,Xin'an CUI,Lanfei XU,Xiaowei LI,Rongqi CHENG. Corrosion Behavior of 304L Stainless Steel in Nitric Acid-Sodium Nitrate Solutions[J]. 中国腐蚀与防护学报, 2018, 38(6): 543-550.
[3]	Xiaoyan ZHAO, Xiwu LIU, Xin'an CUI, Fengchang YU. Corrosion Behavior of 304L Steel in Nitric Acid Environment[J]. 中国腐蚀与防护学报, 2018, 38(5): 455-462.
[4]	Danyang LIU, Jiexia WANG, Jinfeng LI, Yonglai CHEN, Xuhu ZHANG, Xiuzhi XU, Ziqiao ZHENG. Intergranular Corrosion Behavior of T6 Aging Treated Micro-alloyed Al-Cu-Li Alloys with Mg/Ag/Zn[J]. 中国腐蚀与防护学报, 2018, 38(2): 183-190.
[5]	Deqiang LIU,Liming KE,Weiping XU,Li XING,Yuqing MAO. Intergranular Corrosion Behavior of Friction-stir Welding Joint for 20 mm Thick Plate of 7075 Al-alloy[J]. 中国腐蚀与防护学报, 2017, 37(3): 293-299.
[6]	Xinyuan PENG,Xianliang ZHOU,Xiaozhen HUA. Effect of Grain Size on Susceptibility to Intergranular Corrosion of 316LN Stainless Steel[J]. 中国腐蚀与防护学报, 2016, 36(1): 25-30.
[7]	YU Shurong,HE Yanni,LI Shuxin,WANG Lu. Effect of Grain Size on Susceptibility to Intergranular Corrosion for Austenitic Stainless Steel[J]. 中国腐蚀与防护学报, 2013, 33(1): 70-74.
[8]	FENG Wanli, ZHANG Lefu, MA Mingjuan. EFFECTS OF ROLLING ON THE SPECIAL GRAIN BOUNDARIES AND INTERGRANULAR CORROSION OF ALLOY 690[J]. 中国腐蚀与防护学报, 2012, 32(4): 296-299.
[9]	SUN Tao, DENG Bo, XU Juliang, LI Jin, JIANG Yiming. INFLUENCE OF NIOBIUM AND NITROGEN ON THE RESISTANCE TO PITTING AND INTERGRANULAR CORROSION OF 304 AUSTENITIC STAINLESS STEEL[J]. 中国腐蚀与防护学报, 2010, 30(6): 421-426.
[10]	LI Chaoxing; LI Jinfeng; BIRBILIS Nick; JIA Zhiqiang; ZHENG Ziqiao. SYNERGETIC EFFECT OF Mg₂Si AND Si PARTICLES ON INTERGRANULAR CORROSION OF Al-Mg-Si ALLOYS THROUGH MULTI-ELECTRODE COUPLING SYSTEM[J]. 中国腐蚀与防护学报, 2010, 30(2): 107-113.
[11]	. EIS CHARACTERISTICS OF 304 STAINLESS STEEL DURING INTERGRANULAR CORROSION[J]. 中国腐蚀与防护学报, 2007, 27(2): 74-79 .
[12]	;. INTERGRANULAR CORROSION OF 18-8 AUSTENITIC STAINLESS STEEL[J]. 中国腐蚀与防护学报, 2007, 27(2): 124-128 .
[13]	. Sensitive Temperatures for Intergranular Corrosion of Typical Stainless Steels[J]. 中国腐蚀与防护学报, 2006, 26(1): 1-5 .
[14]	. REVIEW ON THE INTERGRANULAR CORROSION AND EXFOLIATION CORROSION OF ALUMINUM ALLOYS[J]. 中国腐蚀与防护学报, 2005, 25(3): 187-192 .
[15]	. Intergraular Corrosion and Exfoliation Behaviors of Peak-Aged AA2090 and AA8090 Al-Li Alloys[J]. 中国腐蚀与防护学报, 2004, 24(3): 135-142 .

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Shared

Discussed