Halo Material

用于F1赛车的安全保护的HALO系统的一些调查总结，Introduction、the raw material、Forming process、Envision。

Halo

I. Introduction

a. what is halo system

b. the history

c. the company producting Halo SYSTEM

II. the raw material

a. Ti6Al4V(TC4 or Gr5)

b. Physical and mechanical properities

c. The heat treatment of TC4

processes

1. mill annealed

什么是轧机退火

轧机退火之后能产生什么效果（可以提供α+β的相图）

2. solution treated

3. aged

STA

什么是STA工艺

STA工艺后能产生什么效果

changes in mocroscopic structure

III. Forming process

a. bending

b. welding

IV. Envision

alternative plan

aeroscreen

shield