Characterization of cast stainless steel weld pools by using ball indentation technique

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• 作者：Gautam Das ; Mousumi Das ; Subhasis Sinha ; Kalyan Kumar Gupta ; Sanchita Chakrabarty ; Ashok Kumar Ray
• 关键词：Weld pool ; Flow properties ; Ball indentation technique ; Microstructure ; Mechanical properties ; Ferrite
• 刊名：Materials Science and Engineering: A
• 出版年：2009
• 出版时间：15 July 2009
• 年：2009
• 卷：513-514
• 期：Complete
• 页码：389-393
• 全文大小：788 K

文摘

Ball indentation technique (BIT) was used to characterize two weld pools of cast stainless steel. Yield strength, ultimate tensile strength, strength coefficient, strain hardening exponent and fracture toughness (K_JC) were determined through BIT. The concept of continuum damage mechanics was employed to evaluate the K_JC of the weld pools. Weld pool having higher Cr content shows superior YS and UTS, but K_JC was slightly lower. This is agreed by the presence of higher amount of ferrite in the weld pool with higher Cr.