The integration of advanced high-strength steels in automotive body-in-white manufacturing has made vehicles lighter, improved crash performance, and reduced noise, vibration and harshness. However, the use of AHSS materials has also been correlated to spot weld cracking, especially with Gen 3 steel grades.
EWI’s new H-coupon test was developed to assess the influence of gap on cracking sensitivity across a range of advanced high-strength steels when spot welded. This test and its results with three candidate steels are discussed in Influence of Gap on the Susceptibility of Interfacial Failure for Spot Welds on Advanced High Strength Steels by EWI’s Jerry Gould and Liya Amanuel.
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To learn more about the test and continuing work, contact Senior Technology Leader Jerry Gould at [email protected].