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首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >A Microstructural Study on the Observed Differences in Charpy Impact Behavior Between Hot Isostatically Pressed and Forged 304L and 316L Austenitic Stainless Steel
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A Microstructural Study on the Observed Differences in Charpy Impact Behavior Between Hot Isostatically Pressed and Forged 304L and 316L Austenitic Stainless Steel

机译：热等静压锻造和锻造304L和316L奥氏体不锈钢的夏比冲击行为观察到的微观组织研究

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With near-net shape technology becoming a more desirable route toward component manufacture due to its ability to reduce machining time and associated costs, it is important to demonstrate that components fabricated via Hot Isostatic Pressing (HIP) are able to perform to similar standards as those set by equivalent forged materials. This paper describes the results of a series of Charpy tests from HIP'd and forged 304L and 316L austenitic stainless steel, and assesses the differences in toughness values observed. The pre-test and post-test microstructures were examined to develop an understanding of the underlying reasons for the differences observed. The as-received microstructure of HIP'd material was found to contain micro-pores, which was not observed in the forged material. In tested specimens, martensite was detectable within close proximity to the fracture surface of Charpy specimens tested at 77 K (-196 A degrees C), and not detected in locations remote from the fracture surface, nor was martensite observed in specimens tested at ambient temperatures. The results suggest that the observed changes in the Charpy toughness are most likely to arise due to differences in as-received microstructures of HIP'd vs forged stainless steel. (C) The Minerals, Metals & Materials Society and ASM International 2015
机译：随着近净成形技术因其减少加工时间和相关成本的能力而成为更理想的零件制造途径，重要的是要证明通过热等静压（HIP）制造的零件能够达到与那些零件类似的标准由同等的锻造材料制成。本文描述了由HIP和锻造304L和316L奥氏体不锈钢进行的一系列夏比测试的结果，并评估了所观察到的韧性值之间的差异。对测试前和测试后的微结构进行了检查，以了解所观察到的差异的根本原因。发现按原样接受的HIP材料的微观结构包含微孔，这在锻造材料中没有观察到。在被测样品中，在77 K（-196 A摄氏度）的夏比样品的断裂表面附近可检测到马氏体，并且在远离断裂表面的位置未检测到马氏体，在室温下测试的样品中也未观察到马氏体。结果表明，夏比韧性的观察到的变化最有可能是由于HIP'd与锻造不锈钢的原始显微组织差异而引起的。 （C）矿物，金属和材料学会和ASM International 2015

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