THERMAL FATIGUE PROPERTIES AND MICROSTRUCTURE OF DIRECTIONALLY SOLIDIFIED DZ38G ALLOY

Acta Metall Sin

1988, Vol. 24

Issue (4): 254-260 DOI:

Current Issue | Archive | Adv Search

THERMAL FATIGUE PROPERTIES AND MICROSTRUCTURE OF DIRECTIONALLY SOLIDIFIED DZ38G ALLOY

ZHANG Jinghua;TANG Yajun;YU Yang;ZHANG Jishan;HU Zhuangqi Institute of Metal Research; Academia Sinica; Shenyang

Cite this article:

ZHANG Jinghua;TANG Yajun;YU Yang;ZHANG Jishan;HU Zhuangqi Institute of Metal Research; Academia Sinica; Shenyang. THERMAL FATIGUE PROPERTIES AND MICROSTRUCTURE OF DIRECTIONALLY SOLIDIFIED DZ38G ALLOY. Acta Metall Sin, 1988, 24(4): 254-260.

Download:

PDF(2861KB)
Export: BibTeX | EndNote (RIS)

Abstract The thermal fatigue behaviour and microstructure in a direction-ally solidified DZ38G alloy have been investigated. It was found that DZ38G alloyhas larger thermal fatigue resistance than that of original M38G alloy because of theelimination of the transverse grain boundaries and the increasing of elastic modulus.Detailed observations show that the microcrack is initiated at the grain boundariesor the phase interface and propagates along interdendrites, grain boundaries and,sometimes, the defined crystallographic directions. After thermal fatigue test, theamount of carbides at grain boundaries increases and the morphology of γ′ phasebecome irregular. Both γ′denudation and recrystallization have been observed onboth sides of the crack.

Key words: DZ38G superalloy thermal fatigue directional solidification microstructure

Received: 18 April 1988

	Service

	E-mail this article
	Add to citation manager
	E-mail Alert
	RSS
	（）
	Articles by authors

URL:

https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1988/V24/I4/254

1 朱景鹏,姚德良,李其娟.航空材料,1980;(4) :21
2 杨富.航空材料,1984;(1) ;37
3 Organ F E, Gell M. Metall Trans, 1971; 2: 943
4 Mowbray D F, Mcconnelee J E. In: Spera D A, Mowbray D F eds., Thermal Fatigue of Materials and Components, ASTM STP 612, Philadephia: ASTM. 1975: 18
5 Woodford D A, Mowbray D F. Mater Sci Eng, 1974; 16: 5

[1]	GONG Shengkai, LIU Yuan, GENG Lilun, RU Yi, ZHAO Wenyue, PEI Yanling, LI Shusuo. Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys[J]. 金属学报, 2023, 59(9): 1097-1108.
[2]	ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing. Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800^oC[J]. 金属学报, 2023, 59(9): 1253-1264.
[3]	LU Nannan, GUO Yimo, YANG Shulin, LIANG Jingjing, ZHOU Yizhou, SUN Xiaofeng, LI Jinguo. Formation Mechanisms of Hot Cracks in Laser Additive Repairing Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1243-1252.
[4]	WANG Lei, LIU Mengya, LIU Yang, SONG Xiu, MENG Fanqiang. Research Progress on Surface Impact Strengthening Mechanisms and Application of Nickel-Based Superalloys[J]. 金属学报, 2023, 59(9): 1173-1189.
[5]	ZHANG Jian, WANG Li, XIE Guang, WANG Dong, SHEN Jian, LU Yuzhang, HUANG Yaqi, LI Yawei. Recent Progress in Research and Development of Nickel-Based Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1109-1124.
[6]	MA Dexin, ZHAO Yunxing, XU Weitai, WANG Fu. Effect of Gravity on Directionally Solidified Structure of Superalloys[J]. 金属学报, 2023, 59(9): 1279-1290.
[7]	LIU Xingjun, WEI Zhenbang, LU Yong, HAN Jiajia, SHI Rongpei, WANG Cuiping. Progress on the Diffusion Kinetics of Novel Co-based and Nb-Si-based Superalloys[J]. 金属学报, 2023, 59(8): 969-985.
[8]	LI Jingren, XIE Dongsheng, ZHANG Dongdong, XIE Hongbo, PAN Hucheng, REN Yuping, QIN Gaowu. Microstructure Evolution Mechanism of New Low-Alloyed High-Strength Mg-0.2Ce-0.2Ca Alloy During Extrusion[J]. 金属学报, 2023, 59(8): 1087-1096.
[9]	CHEN Liqing, LI Xing, ZHAO Yang, WANG Shuai, FENG Yang. Overview of Research and Development of High-Manganese Damping Steel with Integrated Structure and Function[J]. 金属学报, 2023, 59(8): 1015-1026.
[10]	SUN Rongrong, YAO Meiyi, WANG Haoyu, ZHANG Wenhuai, HU Lijuan, QIU Yunlong, LIN Xiaodong, XIE Yaoping, YANG Jian, DONG Jianxin, CHENG Guoguang. High-Temperature Steam Oxidation Behavior of Fe22Cr5Al3Mo-xY Alloy Under Simulated LOCA Condition[J]. 金属学报, 2023, 59(7): 915-925.
[11]	ZHANG Deyin, HAO Xu, JIA Baorui, WU Haoyang, QIN Mingli, QU Xuanhui. Effects of Y₂O₃ Content on Properties of Fe-Y₂O₃ Nanocomposite Powders Synthesized by a Combustion-Based Route[J]. 金属学报, 2023, 59(6): 757-766.
[12]	WANG Fa, JIANG He, DONG Jianxin. Evolution Behavior of Complex Precipitation Phases in Highly Alloyed GH4151 Superalloy[J]. 金属学报, 2023, 59(6): 787-796.
[13]	FENG Aihan, CHEN Qiang, WANG Jian, WANG Hao, QU Shoujiang, CHEN Daolun. Thermal Stability of Microstructures in Low-Density Ti₂AlNb-Based Alloy Hot Rolled Plate[J]. 金属学报, 2023, 59(6): 777-786.
[14]	GUO Fu, DU Yihui, JI Xiaoliang, WANG Yishu. Recent Progress on Thermo-Mechanical Reliability of Sn-Based Alloys and Composite Solder for Microelectronic Interconnection[J]. 金属学报, 2023, 59(6): 744-756.
[15]	WU Dongjiang, LIU Dehua, ZHANG Ziao, ZHANG Yilun, NIU Fangyong, MA Guangyi. Microstructure and Mechanical Properties of 2024 Aluminum Alloy Prepared by Wire Arc Additive Manufacturing[J]. 金属学报, 2023, 59(6): 767-776.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Shared

Discussed