strength as the surrounding material, while in aluminum alloys, the weld and the adjacent heat-affected zone (HAZ) usually are much weaker. A: I don't see any lack of fusion in the bend test sample, but it still fails. These tests can cause more problems in aluminum than in steel. In fact, the 2002 version.2 specifically will state that the wraparound tester is the preferred type for aluminum bend tests. Visit our accessories page to view all wtti apparel that is available for purchase. One of these ways is that aluminum alloys and aluminum welds aren't as ductile as steels. This magazine has served the welding community in North America well for more than 20 years, and we intend to continue providing hands-on information, real-world applications, and down-to-earth advice for welders. American Welding Society.2 specifically states that welds in M23 materials (6000 series alloys) should either be tested as-welded, with the bend sample machined to 1/8. Thick, or annealed before testing with the sample machined to 3/8. Wtti Mega Coupon Carbon Steel Pipe Set. The HAZ then kinks and finally fractures at the crack before the rest of the sample deforms at all.
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Thick for testing (QW-466.1). Sharp corners often start cracks that will cause failure. A: Aluminum alloys are different from steels in several ways. A: This isn't uncommon in aluminum bend tests. Then the sample is bent around a specified radius, with either the root or the face of the weld in tension.
If these bend samples are machined to the standard thickness of 3/8., they often fail. American Society of Mechanical Engineers (asme) Section IX, while not explicit, allows you to machine 6061 or 6063 samples down to 1/8. The reason it snapped is shown. Pipe Coupons, we are now providing welder test coupons for our own in-house WPQs as well as shipping them to any other facilities or jobsites. Believe it or not, machining marks that go across the width of the sample can act as starting points for cracking during testing.
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