[Structural characteristics of laser-welded cast pure titanium joints by different gap distance].
OBJECTIVE
To measure the microstructure of laser-welded cast pure titanium by different gap distance.


METHODS
Forty specimens were sectioned and welded at four gaps (0.00 mm, 0.25 mm, 0.50 mm and 1.00 mm). Took microhardness test and metallographic examination of welded zone surface.


RESULTS
There were no difference in microhardness value and metallographic observation between welded specimens. The width of heat-effected zone was different. The smaller grains and needle-like alphamartensitic structure were found in the heat-affected zone.


CONCLUSIONS
The effects of the joint gap were not significant.
Zhu
Juan-Fang
JF
Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, China.
He
Hui-Ming
HM
Liu
Fang
F
Zhang
Chun-Bao
CB
Wang
Zhong-Yi
ZY
D012994:Dental Soldering; D007834:Lasers; D008422:Materials Testing; D014025:Titanium
D014025:Titanium