Evolution of precipitates and mechanical properties of T6-treated and thermally exposed WAAM-ZL205A alloy

IF 4.7 1区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Hai-jiang LIU , Yan FENG , Chao-qun PENG , Zhi-yong CAI , Meng WANG , Zi-ming LI , Zhi-jie KANG , Xiao-di ZHANG
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引用次数: 0

Abstract

The microstructure and mechanical properties of the WAAM-ZL205A alloy were investigated at various thermal exposure temperatures and compared with those of the deposited and T6-treated alloys. Due to the precipitation strengthening of fine and scattered θ′′ and θ′ phases, the yield strength (YS) of the T6-treated ((535 °C, 10 h) + (175 °C, 10 h)) alloy increases to 366.9 MPa compared with that of the deposited alloy. However, the elongation (El) is reduced to 12.9%. When the thermal exposure temperature increases from 200 to 300 °C, there is a notable decrease in YS and the time required to stabilize is shortened. After thermal exposure at 300 °C for 24 h, part of the θ′ precipitate located at the grain boundary transforms into the θ phase, while the θ′ precipitate within the grains experiences coarsening, resulting in a decrease in YS to 188.9 MPa. Upon surpassing an exposure duration of 120 h, the mechanical characteristics exhibit stability.
t6热处理和热暴露WAAM-ZL205A合金析出相演变及力学性能
研究了不同热暴露温度下WAAM-ZL205A合金的显微组织和力学性能,并与沉积合金和t6处理合金进行了比较。t6处理((535℃,10 h) +(175℃,10 h))合金的屈服强度(YS)较沉积合金提高到366.9 MPa。伸长率(El)降至12.9%。当热暴露温度从200℃增加到300℃时,YS显著降低,稳定所需时间缩短。300℃热暴露24 h后,位于晶界处的部分θ′相转变为θ相,而晶粒内的θ′相发生粗化,使YS降低至188.9 MPa。在超过120小时的暴露时间后,机械特性表现出稳定性。
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来源期刊
CiteScore
7.40
自引率
17.80%
发文量
8456
审稿时长
3.6 months
期刊介绍: The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.
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