Effects of Grain Size and Temperature on Environmental Embrittlement of Ni3(Si,Ti) Alloy.
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概要
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The effects of grain size and temperature on environmental embrittlement of an L1<SUB>2</SUB>-type Ni<SUB>3</SUB>(Si, Ti) ordered alloy were investigated as a function of strain rate by tensile tests and scanning electron microscope fractography. Irrespective of grain size and temperature, ductile-brittle transition (DBT) occurred when the strain rate decreased. Corresponding to the DBT, fracture surfaces changed from transgranular to intergranular fracture. DBT of a coarse-grained material occurred in a higher strain rate region than that of a fine-grained material. DBT of materials deformed at 423 K occurred in a lower strain rate region than that of materials deformed at room temperature. In a very low strain rate region, an anomalous increase of tensile elongation was observed for a fine-grained material deformed at 423 K.
- The Japan Institute of Metals and Materialsの論文
The Japan Institute of Metals and Materials | 論文
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