@article{1994836, title={Development of 590-MPa Class High Tensile Strength Steel with Superior HAZ Toughness by Copper Precipitation Hardening}, author={Yukio Tomita and Toshiaki Haze and Naoki Saito and Takeshi Tsuzuki and Yoshikuni Tokunaga and Kentaro Okamoto}, journal={ISIJ International}, volume={34}, number={10}, pages={836-842}, year={1994}, doi={10.2355/isijinternational.34.836} }