Propagation Behavior of Root Crack in Weld Metal of High Strength Steel on the Basis of AE Source Location Technique : Application of Acoustic Emission Technique for Weld Cracking (III)(Materials, Metallurgy, Weldability)
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AE source location technique is applied to restraint cracking test of HY-type HT90 high strength steel with Y-groove where the root crack has a tendency to initiate and propagate in the weld metal. It is shown that AE events have a tendency to concentrate in places where the root cracks are propagating toward the surface of weld metal. This behavior is caused by anisotropy of propagation of hydrogen-induced crack in weld metal, and is quite different from that in the case where the root crack initiates and propagates in the heat-affected zone.
- Transactions of JWRI
Transactions of JWRI 8(1), 97-103, 1979-06