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.
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.