利用纳米柱压缩试验评价奥氏体不锈钢焊缝Δ-Ferrite的热老化活化能

B. Kong, J. Shin, Gokul Obulan Subramanian, Junjie Chen, C. Jang, Ye-Eun Na, D. Jang, H. Lee, Jun-seog Yang
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引用次数: 8

摘要

摘要采用纳米柱压缩试验对奥氏体不锈钢焊缝中的δ-铁素体进行了热老化激活能的测定。将奥氏体不锈钢焊缝分别在343、375和400℃温度下热时效2万小时。为了避免周围奥氏体基体对脆化测量的干扰,在制备纳米柱之前选择性地溶解奥氏体基体。利用纳米柱压缩试验测得的屈服应力变化,估算出δ-铁氧体的热老化活化能为154 KJ/mol,并与文献结果进行了比较,讨论了差异的原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of Thermal Ageing Activation Energy of Δ-Ferrite in an Austenitic Stainless Steel Weld Using Nanopillar Compression Test
Abstract Nanopillar compression tests were applied on δ-ferrites in austenitic stainless steel welds to measure the thermal ageing activation energy caused by spinodal decomposition. Welds of an austenitic stainless steel were thermally aged at 343, 375, and 400 oC for up to 20,000 h. To avoid the interference of surrounding austenite matrix on embrittlement measurement, austenite matrix was selectively dissolved before the nanopillar fabrication. Using the yield stress changes measured by nanopillar compression tests, the thermal ageing activation energy of δ-ferrite was estimated as 154 KJ/mol, which was compared with literature results and the reasons of discrepancy were discussed.
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