|Table of Contents|

Anisotropy analysis of laser selective melting forming TA7 titanium alloy(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年04期
Page:
99-105
Research Field:
目次
Publishing date:

Info

Title:
Anisotropy analysis of laser selective melting forming TA7 titanium alloy
Author(s):
YANG Xingyuan1;  WEI Hongwei2;  ZHANG Jing2;  WANG Jihang1;  JIANG Muchi1;  LIU Yi1;  REN Dechun1;  CAI Yusheng1;  JI Haibin1
(1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2. Beijing Aerospace Propulsion Institute, Beijing 100076, China)
Keywords:
laser selective melting;  TA7 titanium alloy;  texture;  anisotropy;  heat treatment
PACS:
TG146.23
DOI:
-
Abstract:
Selective laser melting(SLM)was used to produce TA7 titanium alloy with different forming angles. The effects of forming angles and heat treatment on the microstructure, texture and mechanical properties of the alloy were analyzed. The results show that the microstructure of the formed TA7 titanium alloy was significantly affected by the forming angle due to the fast solidification of SLM forming technology. The columnar β grains were parallel to the forming direction, and the α' martensite was formed by rapid solidification in the crystals. When the forming angle was 30°, the orientation density index of the <0001> texture reached the highest 15.05 and Schmid factor was 4.35. Under the influence of microstructure and texture differences, the properties of the alloy had significant anisotropy. With the increase of forming angle, the strength of the alloy increased gradually, and the plasticity of the alloy decreased. After heat treatment, the microstructure of the alloy changed to equiaxed crystal, the texture was weakened significantly, and the mechanical properties of the alloy achieved isotropy. Based on the above research, the TA7 titanium alloy interstage shell with complex runner structure was fabricated by laser selective melting forming technology.

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Last Update: 1900-01-01