TY - JOUR
T1 - Microstructure and Flame-Resistant Properties of Ti-XV-15Cr (X=20, 25, 30, 35) Alloys Prepared by Directed Energy Deposition
AU - Zhang, Fengying
AU - Wang, Gang
AU - Liu, Tong
AU - Wang, Kun
AU - Kang, Chennuo
AU - Peng, Yijie
AU - Li, Yao
AU - Tan, Hua
AU - Chen, Yongnan
N1 - Publisher Copyright:
Copyright © 2021, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.
PY - 2021/2
Y1 - 2021/2
N2 - A series of Ti-XV-15Cr (X=20, 25, 30, 35, wt%) alloys were prepared by directed energy deposition (DED) technique, where pure Ti, pure V, and pure Cr powders were used as raw materials. The effects of V content on grain morphology, microhardness, elastic modulus and the flame-resistant properties of Ti-XV-15Cr alloys were investigated. It is found that the microstructures of Ti-20V-15Cr, Ti-25V-15Cr and Ti-30V-15Cr alloys are composed of columnar grains growing epitaxially and fine equiaxed grains at the top region, and the aspect ratio of the columnar grains decreases gradually with increasing the V content. The microstructure of Ti-35V-15Cr alloy is composed of near-equiaxed grains except at the very top region, which is very different from the microstructure of Ti-20V-15Cr, Ti-25V-15Cr and Ti-30V-15Cr alloys. The formation mechanism of microstructure is explained by combining the columnar to equiaxed transition (CET) model and the relationship between the height of the columnar grains layer and Z axis increment (ΔZ). The average microhardness of Ti-XV-15Cr alloys increases slightly with increasing the V content, and the elastic modulus is between 123.8 and 137.6 GPa. Flame-resistant test shows that Ti-35V-15Cr alloy exhibits the best flame-resistant properties.
AB - A series of Ti-XV-15Cr (X=20, 25, 30, 35, wt%) alloys were prepared by directed energy deposition (DED) technique, where pure Ti, pure V, and pure Cr powders were used as raw materials. The effects of V content on grain morphology, microhardness, elastic modulus and the flame-resistant properties of Ti-XV-15Cr alloys were investigated. It is found that the microstructures of Ti-20V-15Cr, Ti-25V-15Cr and Ti-30V-15Cr alloys are composed of columnar grains growing epitaxially and fine equiaxed grains at the top region, and the aspect ratio of the columnar grains decreases gradually with increasing the V content. The microstructure of Ti-35V-15Cr alloy is composed of near-equiaxed grains except at the very top region, which is very different from the microstructure of Ti-20V-15Cr, Ti-25V-15Cr and Ti-30V-15Cr alloys. The formation mechanism of microstructure is explained by combining the columnar to equiaxed transition (CET) model and the relationship between the height of the columnar grains layer and Z axis increment (ΔZ). The average microhardness of Ti-XV-15Cr alloys increases slightly with increasing the V content, and the elastic modulus is between 123.8 and 137.6 GPa. Flame-resistant test shows that Ti-35V-15Cr alloy exhibits the best flame-resistant properties.
KW - Directed energy deposition
KW - Flame-resistant properties
KW - Microstructure
KW - Ti-V-Cr alloys
UR - http://www.scopus.com/inward/record.url?scp=85103173971&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:85103173971
SN - 1002-185X
VL - 50
SP - 380
EP - 388
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 2
ER -