Microstructure evolution and mechanical properties of 316L austenitic stainless steel with aluminum addition by warm rolling

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Abstract In this present contribution, microstructure evolution and mechanical properties of 316L austenitic stainless steel with aluminum by warm rolling at 550 ��C are investigated. It is found that specimen is composed of an ashen austenite matrix, a gray black ferrite phase and a small number of NiCx. The average grain sizes are 21.62, 19.66 and 19.49 ��m for samples with the rolling deformation of 30%, 50% and 70%, respectively. The yield strength and tensile strength of samples with solid solution time of 30 min and deformation of 70% are higher. The fracture modes are similar and belong to toughness fracture. The fracture surfaces of the samples are composed of relatively large equal-axis ductile dimples (5-15 ��m) and fine scattered ones around the dimples (< 5��m). As the rolling deformation increases, the quantity of subgrain boundary increases and the <101> orientation is more prominent. {100} and {111} cube textures are present in ferrite phase of samples and weak Goss texture formed in austenite pole images.

Key words�� AISI 316L, warm rolling, tensile properties, fracture mechanism, deformation texture

Received: 14 July 2017 Published: 14 November 2018

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	PEIQING
	HENG
	YUPENG
	XUEFENG

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PEIQING,HENG,YUPENG��. Microstructure evolution and mechanical properties of 316L austenitic stainless steel with aluminum addition by warm rolling[J]. Journal of Iron and Steel Research International, 2018, 25(10): 1068-1077.

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http://gt.chinamet.cn/Jweb_gtyjxb_en/EN/ OR http://gt.chinamet.cn/Jweb_gtyjxb_en/EN/Y2018/V25/I10/1068

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