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The thermal fatigue resistance of H13 steel repaired by a biomimetic laser remelting process
Highlights The microstructure and microhardness of strengthening units were analyzed. The thermal fatigue resistance of repaired samples was improved. The blocking effect of strengthening units was analyzed.
Abstract In this study, the biomimetic laser remelting process was adopted to repair thermal fatigue cracks on an annealed hot work die AISI H13 steel. Several treated morphologies: spot, striation and lattice were processed by a pulsed Nd:YAG laser. The ultrafine microstructure within the unit was comprised of martensite, austenite and carbides. The average microhardness of the unit is much higher than that of the original surface, even after thermal cycles. Thermal fatigue results show that both crack density and crack length are reduced due to the blocking effect of strengthening units. And the partial laser surface remelting with lattice morphology is the most effective for repairing cracks and improving the thermal fatigue resistance of all.
The thermal fatigue resistance of H13 steel repaired by a biomimetic laser remelting process
Highlights The microstructure and microhardness of strengthening units were analyzed. The thermal fatigue resistance of repaired samples was improved. The blocking effect of strengthening units was analyzed.
Abstract In this study, the biomimetic laser remelting process was adopted to repair thermal fatigue cracks on an annealed hot work die AISI H13 steel. Several treated morphologies: spot, striation and lattice were processed by a pulsed Nd:YAG laser. The ultrafine microstructure within the unit was comprised of martensite, austenite and carbides. The average microhardness of the unit is much higher than that of the original surface, even after thermal cycles. Thermal fatigue results show that both crack density and crack length are reduced due to the blocking effect of strengthening units. And the partial laser surface remelting with lattice morphology is the most effective for repairing cracks and improving the thermal fatigue resistance of all.
The thermal fatigue resistance of H13 steel repaired by a biomimetic laser remelting process
Cong, Dalong (author) / Zhou, Hong (author) / Ren, Zhenan (author) / Zhang, Zhihui (author) / Zhang, Haifeng (author) / Meng, Chao (author) / Wang, Chuanwei (author)
2013-09-25
8 pages
Article (Journal)
Electronic Resource
English
The thermal fatigue resistance of H13 steel repaired by a biomimetic laser remelting process
| British Library Online Contents | 2014
Thermal fatigue resistance of H13 die steel repaired by partial laser surface remelting process
| British Library Online Contents | 2014
| British Library Online Contents | 2013
| British Library Online Contents | 2013
| British Library Online Contents | 2012