Quantification of Mechanical Factors in the Control of Weld Hot Cracking
Wenda Wang, Shintaro Maeda, Kazuki Ikushima, Takahiro Osuki, Kazuhiro Ogawa, Hiroaki Mori, Masakazu Shibahara
TL;DR
This paper introduces a mechanical model to predict hot cracking in stainless steel welds by analyzing plastic strain during cooling.
Contribution
A new mechanical model is proposed to estimate plastic strain and evaluate hot cracking sensitivity in welds.
Findings
The model expresses BTR plastic strain as the sum of thermal contraction, bending, and external restraint effects.
A critical curvature criterion is derived to compare cracking sensitivity across different weld geometries and heat inputs.
Abstract
Hot cracking in fully austenitic stainless steel welds is mainly caused by plastic strain accumulated while the weld cools through the brittle temperature range (BTR). This study proposes a simple mechanical model to estimate the plastic strain increment in the BTR and to clarify the effects of heat input and plate size (thickness and width). In the model, the BTR plastic strain increment is expressed as the sum of three terms: thermal contraction strain, bending strain due to a non-uniform temperature field, and an additional term caused by external restraint. Hot cracking is judged by whether the BTR plastic strain increment exceeds the critical strain. The model is applied to a restrained plate hot cracking test and a side-bead cracking test. For the side-bead test, we formulate the crack-driving bending moment per unit weld length and derive a simple relation between crack-tip…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsHigh Temperature Alloys and Creep · Fatigue and fracture mechanics · Welding Techniques and Residual Stresses