1 Correlation of modified crack tip opening distance with heat input to the heat affected zone of high-strength low-alloy steels Theoretical and Applied Fracture Mechanics Volume 21, Issue 1,(August 1994) Pages 17-22 J.C. Suárez, F. Molleda, R. Gonzáles, R. Jiménez http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V55-481MYMT-5F&_user=2334008&_coverDate=08%2F31%2F1994&_rdoc=4&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235777%231994%23999789998%23397416%23FLP%23display%23Volume)&_cdi=5777&_sort=d&_docanchor=&_ct=9&_acct=C000056952&_version=1&_urlVersion=0&_userid=2334008&md5=d949fd96ae505c226420fd22e111c3f6