Low-Temperature Brazing of Titanium Using Al-Based Filler Alloys

Table 5

Ti/Ti–Ti/Al-brazed joints using Al–Mg-type filler alloys.

References	Materials				Conditions	Bonding		Shear strength (MPa)	Intermetallic compounds at Ti/filler interface
	Parent 1	Parent 2	Filler
			Type	Thickness/gap width ()		Temperature (°C)	Time (min)
[33]	Ti	Ti	61S(Al (6061)) (Al–1Mg–0.6Si–0.25Cu–0.25Cr)	76	Argon(furnace)		5	73.8–115.7
					Torch with flux			44.8–88.9
[29]	Pure Ti	Pure Ti	Al–1Mg	100	Vacuum of	680	3
[30]	Ti Grade 5, 2	Ti Grade 5, 2	Al–4.5Mg–0.4Si–0.1Cr	800	Vacuum/torch with flux	>638 liquidus temperature		Poor result	,
			Al–4Mg–0.5Si–0.4Mn	500		>640 liquidus temperature		61 in vacuum and 117 by the torch
[3]	Ti Grade 5, 2	Ti Grade 5, 2	TiBraze Al-665 (Al–2.5Mg–0.3Cr)	100	Vacuum/torch with flux	680		110.4 G5 97.6 G2
			Al–4Mg–0.5Si–0.4Mn	320		650–700		98.8 G5 77.4 G2
[31]	OT4 titanium	OT4 titanium	AMg6 (Al–6Mg–0.6Mn–0.4Si–0.4Fe–0.1Ti)	60	Vacuum	685	3	82
			AMg6 (Al–6Mg–0.6Mn–0.4Si–0.4Fe–0.1Ti)	60		720		40
			Al–2.5Mg–0.2Si–0.4Fe–0.2Cr	100		685		83
[84]	Ti Grade 2/Grade 12	Ti Grade 2/Grade 12	TiBraze Al-645 (Al–5Mg–0.2Si–0.2Ti)	<25	EB + vacuum	>melting point	0.5–0.75
[37]	Ti Grade 5	Ti Grade 5	TiBraze Al-665 (Al–2.5Mg–0.3Cr)	100	Ultrasound-assisted induction brazing in air	660	5 sec USV	50–60
[38]	Ti Grade 2	Ti Grade 2	TiBraze Al-665A (Al–2.5Mg–0.3Cr)	50	Ultrasound-assisted induction brazing in air	670	5 min in 560°C + 3 min in 670°C + 6 s USV	∼64

A double-lap joint. Considering 1205°F is the liquidus temperature [88].